JoJo: American Music Awards Pre-Party

JoJo flashes a big smile as she poses at the SLS Hotel before the American Music Awards on Sunday evening (November 20) in Beverly Hills, Calif.

The 20-year-old singer rocked ruby red lips and pants as she got ready for the big musical celebration.

PHOTOS: Check out the latest pics of JoJo

Later that evening, JoJo also supported pal Kevin Jonas as he hosted the XBOX Music Benefit.

Also, check out JoJo performing the National Anthem at the 2011 MLS Cup Final!