Okay, so we know Sharon did quite some guest appearances (if not, see my list below). This topic is there to discuss about all of them :) Which one(s) do we think is the best and which is the worst?

The best, I think is No Compliance. And I like Voyage's Frozen too.
The worst imo is Silicon Head's Hear. Weird song, and Sharon's contribution is kind of boring.

A list of guest appearances:

Album appearances:
Embrace (Voyage, 1996) "Frozen"
Bash (Silicon Head, 1997) "Hear"
Into the Electric Castle (Ayreon, 1998) "Isis & Osiris," "Amazing Flight," "The Decision Tree," "Tunnel of Light," "The Garden of Emotions," "Cosmic Fusion," "Another Time, Another Space"
Schizo (Heideroosjes, 1999) "Regular Day in Bosnia"
Prison of Desire (After Forever, 2000) "Beyond Me"
The Metal Opera (Avantasia, 2000) "Farewell"
Inside (Orphanage, 2000) "Behold"
Architecture of the Imagination (Paralysis, 2000) "Fly," "Architecture of the Imagination"
Fast Forward (Heideroosjes, 2001) "Last Call to Humanity"
The Metal Opera Part II (Avantasia, 2002) "Into the Unknown"
Hymn to Life (Timo Tolkki, 2002) "Are You the One?"
Fooly Dressed (Aemen, 2002) "Time," "Waltz"
Lucidity (Delain, 2006) "No Compliance"
Mea Culpa (After Forever, 2006) "Beyond Me" (Gruntless version)
Imagine (Armin van Buuren, 2008) "In And Out Of Love"
Prison of Desire: The album - the sessions (After Forever, 2008) "Beyond Me" (Album version and session version)
Pure Air (Anneke van Giersbergen, 2009) "Somewhere"
Imagine: The Remixes (Armin van Buuren, 2009) "In And Out Of Love" (The Blizzard Remix and Richard Durand Mix)
TBC (Chris Jones, 2010?) "Stupid"

Singles:

Time (Aemen, 2003) Radio Version/Live @ Denk aan Henk, 3FM
Als Je Iets Kan Doen (Artiesten voor Azië, 2005) * all-star charity single
In And Out Of Love (Armin van Buuren, 2008) Radio Edit/Album Version/The Blizzard Mix/Richard Durand Mix

DVD appearances:
Live is a Magic Theatre (Aemen, 2006) "Time" (Live Video and Music Video)

Live/Others:
Heideroosjes - "Regular Day in Bosnia" (Live @ Pinkpop 1999)
Rosemary's Sons - "Shine" (Live @ Dauwpop 2002 and maybe a few more)
Eric Dikeb/Henk Westbroek/Di-rect - "Zwemmen In De Lucht" (2001 or 2002)
Heideroosjes - "Candy" (Live @ Pinkpop 2005)
After Forever - "Beyond Me" (Live @ Java Island 2005 and Live @ Beekefeesten, Bathmen, 2006)
Delain - "No Compliance" (Live @ Broerenkerk, Zwolle 2007 and a few French dates, Live @ Lowlands 2009)
Armin van Buuren - "In And Out Of Love" (Live @ Armin Only, Jaarbeurshallen Utrecht, 2008)
Boudewijn de Groot - "Meester Prikkebeen" (Live @ Vrienden van Amstel Live! 2009)
Boudewijn de Groot - "Avond" (Live @ Vrienden van Amstel Live! 2009)
Bart van der Weide/Henk Hofstede - "Dodenrit" (Drs. P cover, Live @ Vrienden van Amstel Live! 2009)
Agua de Annique - "Somewhere" (Live @ Melkweg, Amsterdam & Live @ Oosterpoort, Groningen 2009)
Peter & Zoltan Katona feat. John Miles - "Stairway To Heaven" (Live @ Night of the Proms 2009)

Semi-Solo:
"Crucify" (Tori Amos cover, live with the band of Belgian TV show 'De Laatste Show', 2002)

Notes:
There's also a TV perfomance of "Als je iets kan doen", but Sharon's parts were mimed.
The Aemen site reports some more radio perfomances of 'Time', but it's
unsure if Sharon was present in those. She also joined them for a few
live gigs.
Sharon has also sung "Behold" with Orphanage a couple of
times, a small piece can be found on The Silent Force Tour DVD. Other
perfomances are unknown.

No Compliance pwns. Seems like both Westerholt boys have great musical talent.
I think Time with Aemen was a bad idea. Their voices don't mix.

Time was definetly not a good idea No Compliance was better imo

A list of guest appearances:

Embrace (Voyage, 1996) "Frozen"
Bash (Silicon Head, 1997) "Hear"
Into the Electric Castle (Ayreon, 1998) "Isis & Osiris," "Amazing Flight," "The Decision Tree," "Tunnel of Light," "The Garden of Emotions," "Cosmic Fusion," "Another Time, Another Space"
Schizo (De Heideroosjes, 1999) "Regular Day in Bosnia"
Prison of Desire (After Forever, 2000) "Beyond Me"
The Metal Opera (Avantasia, 2000) "Farewell"
Inside (Orphanage, 2000) "Behold"
Architecture of the Imagination (Paralysis, 2000) "Fly," "Architecture of the Imagination"
Fast Forward (De Heideroosjes, 2001) "Last Call to Humanity"
Fooly Dressed (Aemen, 2002) "Time," "Waltz"
The Metal Opera Part II (Avantasia, 2002) "Into the Unknown"
Hymn to Life (Timo Tolkki, 2002) "Are You the One?"
Lucidity (Delain, 2006) "No Compliance"
"Crucify" (Tori Amos cover, live with De Laatste Show-band)

There's also "Candy" (Live with Heideroosjes, at Pinkpop 2005) and "Zwemmen In De Lucht" (a song broadcast on radio with two deejays) and "Als Je Iets Kan Doen" (all-star charity single by "Artiesten voor Azië")

Just came across another new guest appearance by Sharon on the official site. It's very catchy but a different style of music. The CD is called Going Wrong by Armin van Buuren. The release date is the 22 April from what I read on the official site.

I can't seem to stop listening at the moment!

http://arminvanbuuren.hyves.nl/

to be honest, i haven't liked most of her guest appearances for some reason. i feel like a lot of the songs have been really lackluster

Sharon joined Armin van Buuren at 'Armin Only' to sing In And Out of Love

http://www.youtube.com/watch?v=esKvE55T0R4

Sharon is not really used to a dance-audience, bless her.

Well I really loved when they did "Kronenburg Park" with Frank Boeijen. That's probably one of my favorites.

...I don't know if I really disliked -any- of them.

And "In and Out of Love" stole my heart right when I heard it. I'm a big techno and dance music fan...add something WT into that and you've sent me directly to heaven.

I really like her guess appearances in AF shows singing "Beyond Me" together with Floor

Just look at this video( bad quality but well )
http://youtube.com/watch?v=vtuBOFFhcdc

The studio version of that's really cool too

*Uses this as Guest-Appearance topic*

The "In And Out Of Love" single gets released in August, and on this site you can listen to two remixes. I think track 3 is pretty good.

Tries again...

Could you rename the link? It's not working. Copy + paste or clicking.

Like this.

BBCode on this board hates me I can't get any code to work!

Oh, never mind, an alternative link did work.

Whoopie!!!

Yeah, 3 is awesome. I love it.

Thanks for posting that.

I love a lot of her guest appearances though there are some I just didn't like.

I really like "Time", "In And Out of Love", "Candy", "Frozen" with Voyage, "Beyond Me" and "No Compliance"

Does anyone have a recording or video of "Candy"? I'm very curious.

I have the audio to it. And will share through pm request only so no one can fuss at me for it.