what are the REAL songs by Leighton?

Birthday is another of hers, it's a cover of the song by Awesome New Republic. You can listen to it on YT :)

The others I've not heard of but they are probably going to be on her album, which is released at some point early this year.

Out of the ones you were unsure about...

birthday (a collaboration she did with Awesome New Republic)
inside the black (A cover she did for her movie Drive Thru...she performs the song in the movie!)


all the others...again, again is a song by Lady Gaga not leighton...
Superstar - Lady Gaga wrote that song and I think it was offered to leight for her album...not sure if she took it but there is no leighton versions of any of those other songs...its just rumours...
if she were to record those song and they were to be leaked on the internet we would know about it for sure!
hope that's helped!

i know for sure: Somebody to Love, Body Control, Birthday, Bette Davis for Eyes, Good Girls go Bad. Thats all I know

Well actually,

- Good girls go bad is from Cobra Starship
- Birthday from The New Republic
- Bette Davis Eyes from Kim Carnes
(She did perform it, but it's not her songs)
And I think that Inside the black is also a cover

Her songs are (no cover),
- Somebody to Love Featuring Robin Thicke
- Set it on fire
- Your love's a drug
- Just Wanna Dance
- Body Control

These are the one's I'm sure about it :)