Lindsey Cherowbrier as "Astrid" from Voyage of the Damned.
Gallifrey 2009 part 50: Saturday Evening (14-Feb-2009)
Someone as "Astrid" in background somebody else as Captain Jack Harkness, Aimee Major Steinberger in blue and red sparkle suit as the Tenth Doctor all sitting on floor at left; someone in the back with thumbs up, Van Donovan in glasses and black and white houndstooth pants as the Second Doctor, Judy G. in purple sequinned dress as "Donna," and the dancing TARDIS man in blue. Most of them (not Van) where in the Whosical Masquerade entry.
Gallifrey 2009 part 51: Saturday Night (14-Feb-2009)