The Backstreet Boys – Only at the iHeartRadio Festival will you see a collaboration with the ‘90s boy band and Florida Georgia Line. Ariana Grande – we love the way this “Dangerous Woman” singer performed on Night Two of the festival. John Stamos, Taylor Lautner and Sting – “Police Reunion 2017. #DontStandSo CloseToUs #iheartradio,” John wrote on Instagram after the surprise meeting. Ben Higgins, Luaren Bushnell and Laurie Hernandez – while celebrating their one-year anniversary, The Bachelor stars meet one of their favourite Team USA athletes. Britney Spears – whether dancing to Mary J Blige or bringing out G-Eazy, the “Circus” singer’s performance was pretty hot. Lea Michele and Brad Goreski – when not dancing to Ariana Grande or Britney Spears, the BFFs pose for photos backstage at the T-Mobile Arena. Usher – after making an appearance at the Global Citizens Festival in New York City, the “Yeah!” singer arrives in Las Vegas to perform for a sold-out crowd. Wilmer Valderrama and Ashley Iaconetti – the Bachelor in Paradise star can’t help but smile while posing next to the Hollywood actor. Tinashe – what better way to celebrate a performance than with Jiff! Miley Cyrus and Billy Idol – surprise! ‘The Voice’ coach appears onstage with the rocker for an unexpected performance. John Stamos and Taylor Lautner – before introducing Britney Spears to the stage, the Scream Queens stars have some fun backstage. Laurie Hernandez, Val Chmerkovskiy, Sharna Burgess and James Hinchcliffe – everybody stops for Jiff, especially the ‘Dancing with the Stars’ family. Jamie Foxx and Don Cheadle – it’s family night at the T-Mobile Arena for Hollywood’s biggest stars. Drake – Oh what a night! The rapper delivers an electric set on night one of the iHeartRadio Music Festival. Sam Hunt – from rock ‘n’ roll to country music, there’s something for everyone at this festival. Jojo Fletcher and Brad Goreski – in between dancing to Sam Hunt, the Fashion Police co-host meets up with the happily engaged JoJo. Taylor Lautner, Sharna Burgess and James Hinchcliffe – team Jacob? This ‘Dancing with the Stars’ pair sure is! Chris Soules, Wells Adams, Chase Mcnary and Robby Hayes – the boys of ‘The Bachelorette’ are back in Las Vegas for the iHeartRadio Festival. Jojo Fletcher and David Spade – you just never know who you’re going to meet at the iHeartRadio Music Festival. Haley Ferguson, Emily Ferguson and Ashley Iaconetti – the Bachelor in Paradise stars reunite at the T-Mobile Arena in Las Vegas.