As The Voice gears up to crown its champ during tonight's finale, there's no doubt about last night's spat between Christina Aguilera and Adam Levine.

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Although the spotlight should have been on the four contestants — Tony Lucca, Chris Mann, Juliet Simms and Jermaine Paul — Christina and Adam stole the show with their bickering about Adam's protégé Tony. Okay, it wasn't so much about Tony as the song he sang.

Tony rocked out to Jay-Z's hit "99 Problems." Well, this song has lyrics that could technically be deemed as inappropriate ("I got 99 problems but a b*tch ain't one"). Christina explained, "Your beautiful wife and your daughter are here tonight and I just thought, you know, the lyrical connotation was a little derogatory toward women, but all in all, it was good fun."

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This prompted Adam to retort, "It's called a metaphor…we're not referring to women; we're referring to everything."

No wallflower, Christina added, "If that's how you have to get points…" 

Then Adam shot back, "I just want to say, 'I love you, Christina,' but Tony, I thought you did fantastic."

Later on, Tony thanked Adam during the show's "amazing, life-altering experience," though Christina could be spotted texting during his heartfelt speech! 

Then, she called her own protégé Chris "a real man [who] respects women." 

Wow! If tonight's finale is any indication of last night's sparks, it will certainly be one to watch. Catch the two-hour finale at NBC at 9 p.m. ET!

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