Lady Gaga has come a long way in the past year. She performed at the Grammys, met the Queen, and guest-starred on Gossip Girl -- not to mention releasing her chart-topping second album, Fame Monster, and touring around the world. Happy birthday, Lady Gaga!

Fun Facts About Lady Gaga:
- She loves Glee -- and will guest star in an upcoming episode!
- Everyone's a fan! When J-14 caught up with Victoria Justice, she chose "Bad Romance" as her fave song and even karaoked it for us.
- Can't get enough Gaga? You can catch her on the second leg of her Monster Ball tour this summer.

Leave your birthday wishes for Lady Gaga below!

Photo: Courtesy of Interscope