BARCELONA, SPAIN - NOVEMBER 14: Pop sensation Christina Aguilera performing on stage at the MTV European Music Awards 2002 he
Dave Hogan/Getty Images

Our favorite singer, Voice judge and Lady Gaga's new BFF, Christina Aguilera, turns 33 today. That means it's time to celebrate the singer's 20-year career—if you include the Mickey Mouse Club, of course. 

We've compiled this massive, 65-song playlist (below), starting with the singer's 1998 contribution to Mulan and including all of Xtina's biggest hits, major duets, soundtrack tunes and even a few deeper cuts for the longtime Fighters out there.

Check it out below. Happy birthday, Xtina!!!

MORE » WHY CHRISTINA AGUILERA IS THE "PEOPLE'S VOICE"