Hilary Duff. Her singing career hasn't exactly taken off and there's been some (anonymous) gossip that her sister factors heavily in her recordings. Still, she just got married and doesn't exactly strike me as "desperate."
JoJo. Singing career seems stalled, and she's never been very shy about showing off her, uh, physical talents.
Alexz Johnson. Canadian singer/actress who I think won a contest to star in "Instant Star" -- a fictional series about a young singer who wins a contest to become a recording star. Her star hasn't risen.
Kate Todd. Former star of Canadian series "Radio Free Roscoe" in which her character among other talents was the lead singer and guitar player in a rock trio. Pretty sure she is still plugging away at a recording career that hasn't taken off as hoped.
And just for fun, I'll add a long shot to the list:
Christy Carlson Romano. Former Disney girl and star of "Even Stevens" and more recently on Broadway (briefly) in "Avenue Q" and another play that closed quickly. Has had modest success with a recording career. In addition, she's been in a number of movies in the "straight to video" category. Most recently can be seen -- nude in a shower scene -- in Mirrors 2. Clearly has overcome any shyness about showing off her (spectacular IMHO) body, but fact that she's already been seen nude would appear to lessen the impact of any "shocking" photos.
Hilary Duff is the popular choice at BuzzFoto.