Michelle Chamuel surprised her coach Usher with her song selection Monday's Top 6 Live Performance show- Taylor Swift's I Knew You Were In Trouble.

Chamuel then received a surprise of her very own, an appearance and coaching session by Swift herself.

As Chamuel was rehearsing to Swift's hit song, Usher brought out the country crooner to introduce to his contestant. A shocked Chamuel said of Swift's cameo appearance, "Do I really have to keep singing right now? This is crazy!"

"Thanks for picking my song" Swift told her. "I would love to hear you sing it," she said before she began coaching her.

"Meeting Taylor Swift was crazy," Chamuel later said in her on-camera confessional.

After Chamuel performed Swift's song, host Carson Daly called her performance the most "enthusiastic of the night."

Later, Usher told the audience, "If Taylor Swift loved it, I knew America would, too."

Shelton admitted that Usher retianing Swift to coach his contestant made him "so freaking jealous!"

"Dude you got Taylor to come in there?!" Shelton said to Usher.

Daly asked Usher how Chamuel pulled off such an awesome performance after seeing Swift and he replied, "I guess we knew she was trouble when she walked in."

Shelton led the pack of coaches with the most remaining contestants on Monday's Top 6 Live show.

The Top 6 contestants performed the following songs listed by artist here:

Team Blake: Danielle Bradbery- Pam Tillis, Shake The Sugar Tree and Little Bit Stronger

The Swon Brothers- Wagon Wheel and Okie From Muskogee

Holly Tucker- Martina McBride, When God-Fearin' Women Get The Blues and Rascal Flatts, My Wish

Team Adam: Amber Carrington- Skid Row- I Remember You and Patsy Cline, Crazy

Team Shakira: Sasha Allen- Aretha Franklin, Aint No Way and Carrie Underwood, Before He Cheats

Team Usher: Michelle Chamuel- Keane, Somewhere Only We Know

The Top 6 singers will learn the votes they earned after Monday's showdown on Tuesday during the Results show. That night they will learn which two earned the lowest totals and will be sent home.

Spoiler alert for Tuesday's Top 6 Results Show: Season 3 winner Cassadee Pope will perform her brand new single, Wasting All These Years.

NBC's The Voice Top 6 Results show will air on June 4 at 8/7 p.m. Central on NBC.

Watch Taylor Swift coach Michelle Chamuel on The Voice Top 6 LIve Show here.

Tags: the voice season 4