Gwen Stefani (with George Clooney and Julia Roberts)
Gwen Stefani made an appearance back in 2016 when she released her latest album This is What the Truth Feels Like. They sang some favorites like “Sweet Escape,” No Doubt’s “Don’t Speak,” and some new favorites. The two of them also picked up some friends – George Clooney and Julia Roberts – and the four of them sang “Hollaback Girl” and “We are the Champions” by Queen.