The cryptic message seems to imply the song title may be “2U,” judging by the hashtag. There's no tease about the nature of the tune, but given the pair in question, we expect dance pop at its brightest.
Collaborations have done well for Bieber as of late, as he's currently in two of the top three spots on the Billboard Hot 100. His star-studded DJ Khaled collab "I'm the One" (also featuring Quavo, Chance the Rapper and Lil Wayne) reached No. 1 but is now No. 3, and was knocked off the top spot by another Bieber feature -- the remix of Luis Fonsi and Daddy Yankee's "Despacito," which is currently at No. 1 (chart dated June 17). Who knows, with the Guetta addition, Bieber could rule the entire top 3 next week.