Here is the full list of all 11 Celebrities Hacked achievements.
Expose 90% or more of the level area
Disintegrate 4 OnLine enemies in one level
Pick up 69 powerups
Gather 3 stars
Gather 9 stars
Gather 18 stars
Respawn 64 times
Finish any level in less than 30 seconds
Hack 1 photo
Hack 3 photos
Hack 6 photos