Lady Gaga celebrates a birthday today.  Born Stephanie Germonatta, she'll be celebrating her 25th by performing on stage in LA at the Staples Center tonight.

I'm sure her little monsters will sing Happy Birthday to her sometime during the show tonight.

She's come a long way in just a couple of years after arriving on the music scene.

What is your most memorable Lady Gaga moment?  She's had a ton of them so far and we're looking for more to come too!