Meanwhile, the NBC hit topped Fox's "American Idol" in the 18-49 demo on Wednesday
After the four teams on "The Voice" were whittled down to three singers each, the contestants and the coaches journeyed from Burbank to West Hollywood to entertain an invited crowd at the House of Blues.
With Adam Levine behind the drums, Shakira, Usher and Blake Shelton opened the evening with the Beatles' "Come Together" before Levine switched to guitar and jammed with Usher on Stevie Wonder's "Superstition." Shakira, seemingly inspired by the mic stand manipulation of "Voice" guest Rod Stewart, struck a string of rock-star poses as Shelton and the "The Voice" band plowed through the Lady Antebellum hit "Need You Now."
The dozen singers remaining in the competition reprised numbers that they have performed to date, with Sasha Allen's particularly soulful reading of the Beatles' "Oh Darling" being the highlight of the night.
I Heart Radio was streaming the event, clips of which will likely wind up in an upcoming episode.
NBC and members of "The Voice" family woke up to good news Thursday as the show topped Fox's "American Idol" in the 18-49 demographic. Going head-to-head Wednesday, 3.45 million viewers between the ages of 18 and 49 watched "The Voice" vs. 3.19 million viewers tuning in "Idol," according to Nielsen Media. In total viewership, "Idol" won 9.5 million to 8.7 million.