On the other end of the spectrum, from older and underground to just yesterday on the most commercial platform out there...
Bieber and Diddy got on stage along with Jack U (Diplo and Skrillex) to close down UMF.
Can't eem lie, I randomly played Biebers song with Jack U earlier in the day. Don't care who it was that laid down the vocals, or if their engineer can make Randy Marsh sound like Lorde...it's a pretty cool song imo.
the Alunageorge song To U on their album is cool too