She might've had 99 problems last night ... but this performance wasn't one!

Among other, um, issues, Christina Aguilera had a throat cold on The Voice last night ... but she STILL managed to sound better than you ever will AHmazing!

The songstress and Voice mentor took to the stage last night with finalist Chris Mann, singing The Prayer, which was originally done by Celine Dion and Andrea Bocelli!

Check out the STUNNING performance (above)!!!

Wow! Christina definitely proved why she's on the show in the first place...and Chris did great as well!

After the performance, Chris tweeted: TheRealXtina u are my mama and I heart u. U slayed #ThePrayer tonight. Period. #TheVoice #Vote4ChrisMann

— Chris Mann Music (@IamChrisMann) May 8, 2012

Um...okay then! LOLz!

Chris later also tweeted that last night was the "greatest night" of his life and that he was having a hard time pulling himself together after living out his dream!

Be sure to tune in TONIGHT at 9pm to see who gets crowned, along with performances from the coaches, Justin Bieber, Hall & Oates, Lady Antebellum and Flo Rida!