The duo treated Los Angeles to a heart-wrenching rendition of “Love Me Harder” (complete with the correct lyrics), followed by the hits “Where Are U Now” and “As Long as You Love Me.”
Bieber, 21, teased fans ahead of the appearance, writing on Twitter: “What should I do tonight? Hmmmm.” Later, he thanked fans for a great evening. “Love the stage. Thanks for having me @ArianaGrande and thanks LA. Gotta tour again soon :),” he wrote.
Bieber previously met up with Grande, 21, on her tour in Miami in late March, where he flubbed the lyrics to “Love Me Harder.” But the singer handled the mistake with aplomb.
“So I feel bad, I forgot the words, Ariana,” he told the pop diva after the song ended. “I’ve been trying to memorize them backstage for like an hour!”
She reassured him “nobody heard,” and the two went on to perform “All That Matters.”
Could Bieber be hitting the road himself sometime soon? Only time will tell, though the singer did Tweet that he’s “working on music” Wednesday.