Hot 100 Fest's Best Surprise Onstage Collabs (So Far), From Bieber & Skrillex to Camila Cabello & Major Lazer

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Skrillex (L) and Justin Bieber perform live during the 2015 Billboard Hot 100 Music Festival at Nikon at Jones Beach Theater on Aug. 23, 2015 in Wantagh, New York. 

The Billboard Hot 100 Festival is just over a week away -- coming to Northwell Health at Jones Beach Theater on August 18 & 19 -- and it's sure to be an unforgettable weekend. With major headliners Halsey, Rae Sremmurd, DJ Snake and Future, as well as the rest of the star-studded lineup, there's plenty of room for some wild surprise guests.     

Will Machine Gun Kelly bring out Camila Cabello for a throwback performance of their hit "Bad Things"? Or maybe Kehlani can team up with Normani to finally reveal the collaboration they've been hinting at.    

Hot 100 Fest is no stranger to fun link-ups, with years of special guests under its belt. See below for the five best onstage musical collaborations over the years, and find tickets for the festival here.   

Major Lazer & J Balvin (2017)
​The trio's closing set at last year's festival was a perfect way to close out the weekend. Among the performance's surprises was J Balvin's appearance to sing his global megahit "Mi Gente." Pyrotechnics and beat drops had the crowd bursting with energy.   

​Major Lazer & Camila Cabello (2017)
J Balvin wasn't the only treat Major Lazer had for concertgoers: The trio brought out Cabello too, to deliver their rhythmic collab "Know No Better."

Ariana Grande & Mac Miller (2016)
These former flames sparked romance rumors at the time when Grande brought out the rapper during her performance of their 2013 duet "The Way." Mac came out for his verse as the two danced around each other.

Skrillex & Justin Bieber (2015)
The pop icon, who had his own set earlier in the festival, joined his DJ friend for a high-energy, visually enticing performance of "Where Are U Now." The background screen even featured the same hand-drawn figures seen in the song's music video.

DJ Khaled & Asahd
OK, technically this one isn't a musical collaboration, but an Asahd appearance is always worth mentioning. The "No Brainer" producer rolled up onto the stage carrying his 1-year-old son, who was decked out in Gucci sneaker and protective headphones for his sensitive baby ears.

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