Between the Jonas Brothers' Captial FM set with Busted and Ariana Grande's duet with Barbra Streisand, this year has delivered a handful of amazing live performances from artists collaborating on stage. Even Elton John and Taron Egerton got in on the action with a few joint productions while promoting John's biopic Rocketman. We certainly love each of these singers individually, but when they combine their vocals, it's like musical heaven. Keep scrolling to watch some of the best onstage mashups from 2019!
Image Source: Getty / Rich Fury