![Nate Ruess of the band Fun performs solo in concert during the Radio 104.5 Summer Block Party at Festival Pier on Sunday, July 12, 2015, in Philadelphia. (Photo by Owen Sweeney/Invision/AP Stock Nate Ruess of the band Fun performs solo in concert during the Radio 104.5 Summer Block Party at Festival Pier on Sunday, July 12, 2015, in Philadelphia. (Photo by Owen Sweeney/Invision/AP Stock](https://c8.alamy.com/comp/2N2106M/nate-ruess-of-the-band-fun-performs-solo-in-concert-during-the-radio-1045-summer-block-party-at-festival-pier-on-sunday-july-12-2015-in-philadelphia-photo-by-owen-sweeneyinvisionap-2N2106M.jpg)
Nate Ruess of the band Fun performs solo in concert during the Radio 104.5 Summer Block Party at Festival Pier on Sunday, July 12, 2015, in Philadelphia. (Photo by Owen Sweeney/Invision/AP Stock
![David Guetta seen at iHeartRadio Summer Pool Party at Caesars Palace on Saturday, May 30, 2015 in Las Vegas, NV. (Photo by Carlos Larios/Invision/AP Stock Photo - Alamy David Guetta seen at iHeartRadio Summer Pool Party at Caesars Palace on Saturday, May 30, 2015 in Las Vegas, NV. (Photo by Carlos Larios/Invision/AP Stock Photo - Alamy](https://c8.alamy.com/comp/2N28JY9/david-guetta-seen-at-iheartradio-summer-pool-party-at-caesars-palace-on-saturday-may-30-2015-in-las-vegas-nv-photo-by-carlos-lariosinvisionap-2N28JY9.jpg)
David Guetta seen at iHeartRadio Summer Pool Party at Caesars Palace on Saturday, May 30, 2015 in Las Vegas, NV. (Photo by Carlos Larios/Invision/AP Stock Photo - Alamy
![Nate Ruess of the band fun. performs solo in concert during the Radio 104.5 Summer Block Party at Festival Pier on Sunday, July 12, 2015, in Philadelphia. (Photo by Owen Sweeney/Invision/AP Stock Nate Ruess of the band fun. performs solo in concert during the Radio 104.5 Summer Block Party at Festival Pier on Sunday, July 12, 2015, in Philadelphia. (Photo by Owen Sweeney/Invision/AP Stock](https://c8.alamy.com/comp/2N2106E/nate-ruess-of-the-band-fun-performs-solo-in-concert-during-the-radio-1045-summer-block-party-at-festival-pier-on-sunday-july-12-2015-in-philadelphia-photo-by-owen-sweeneyinvisionap-2N2106E.jpg)