kristenjoanjett.jpgcourtesy Apparition

Kristen Stewart almost bared her breasts in The Runaways! Talk about a see-thru shirt with a little nip!

Check out this shot in which Stewart, as rock legend Joan Jett, jams in her bedroom after her band breaks up. All we need now is for Dakota Fanning to enter stage left in a miniskirt and an off-the-shoulder tee!

It'll come ... on March 19th when the indie film hits theaters.