Lady Gaga wears an all-leather look to her 38th birthday dinner at Giorgio Baldi in Santa Monica, Calif. Credit : The Hollywood Curtain/Bauer-Griffin/GC Images Lady Gaga went full-on biker chic ...

Lady Gaga celebrated her 38th birthday with her friends and boyfriend Michael Polansky, who "let her shine," a source tells PEOPLE. The group enjoyed a night out at Giorgio Baldi in Los Angeles ...

Lady Gaga was surrounded by loved ones on her special day! Earlier this week, the star celebrated her 38th birthday at Giorgio Baldi in Santa Monica, California. The dinner was a low-key ...