Justin Timberlake pulled a double-duty shift as host and musical guest on 'Saturday Night Live' over the weekend. Backed by his lively band the Tennessee Kids, the R&B crooner performed 'Suit & Tie' and 'Mirrors.'

Dressed in a swanky tuxedo with matching black-and-white shoes with red bottoms, JT gave an energetic performance of 'Suit & Tie' complete with background dancers doing the two-step.

Timberlake also altered his lyrics a bit and sang, "My hits so sick got rappers acting so dramatic." Hmm? Was that a shot at Kanye West, who is not a big fan of his song?

Then Jay-Z graced the stage to spit his verse. Draped in gold jewelry, Hov was dressed in an all-black suit, but instead of Nike dunks, like he mentions in the song, he was rocking a pair of black and royal blue Air Jordan 1s. Show them how to do it, young!

The dynamic duo's performance was a good indicator of how exciting their upcoming tour, dubbed Legends of the Summer, is going to be in July. Their trek kicks off July 17 in Toronto, Ontario before wrapping up on Aug. 16 in Miami.

For his final performance, Timberlake was introduced by the Three Amigos -- Martin Short, Steve Martin and Chevy Chase. Why? We have no idea.

Donning another fresh tuxedo accentuated with a red carnation flower, the dapper singer provided a high-spirited rendition of 'Mirrors.'

And don't forget. You can cop Justin Timberlake's third album, 'The 20/20 Experience,' when it arrives in stores on March 19.

Watch Justin Timberlake Perform 'Mirrors' on 'Saturday Night Live'