The 32-year-old entertainer was joined on stage by Pitbull while performing “Feel This Moment.”
“Happy Hillbilly Birthday @BlakeShelton sending you love! XoXtina,” Christina tweeted earlier in the day.
Over the weekend, Christina was spotted rocking a fedora while arriving at Four Seasons Hotel in L.A.
Christina Aguilera – ‘Feel This Moment’
10+ pictures inside of Christina Aguilera performing on The Voice… More Here! »