Images from scenes with perception altering spells like in Superstar, warped POV like in Storyteller, or yes dream sequences, flashbacks or anything else where the characters are perceived or portrayed by themselves or other characters in a "too good to be true" light would work. Also you can manip OCs (they can be portrayed by stars like in Kelly's example or just those too perfect looking models used in advertising) into an image, solving the problems the Scoobies couldn't or just being annoyingly perfect.