Lady Gaga’s Birthday Concert Cake

She has always possessed a killer work ethic, and last night (March 28) Lady Gaga was giving it her all in concert on her 25th birthday.

The “Just Dance” diva looked fit and fine in a midriff-bearing getup as she finished up her gig at the Staples Center in Los Angeles.

And after the last song, Gaga’s backup dancers surprised her by bringing a birthday cake out onstage to celebrate her big day.

Of course, Lady Gaga looked tickled pink at the gesture, and proceeded to enjoy a slice of her birthday treat.

Enjoy the pictures of Lady Gaga onstage at Staples Center (March 28).