Lady Gaga: Pre Performance Plunging Neckline!

Lady Gaga waves goodbye to her fans outside Chateau Marmont on Thursday (July 28) in Los Angeles.

The 25-year-old superstar wore a black dress with a plunging neckline and a pair of high heeled shoes before heading over to perform at the Jimmy Kimmel Live!

PHOTOS: Check out the latest pics of Lady Gaga

Gaga performed her hit song “You and I” to the packed Jimmy Kimmel crowd!

The day before, Lady Gaga was moved to tears by dancers Marko and Allison on So You Think You Can Dance!

10+ pictures inside of Lady Gaga outside of Chateau Marmont…