Horan was at the White House for a Saint Patrick's Day performance
They will join Billie Eilish and Florence + The Machine on the main stage
The former One Direction star made a surprise appearance at the Country To Country festival
"Welcome to close friends Harry Styles edition"
"They clearly weren't good enough because we would have heard them by now"
"This album is a piece of work I'm so proud of and now it's time to pass it over to you to go and make it your own"
Lil Nas X, Kygo, Niall Horan, Maisie Peters and Central Cee also feature on the line-up for Lollapalooza's next Paris edition in July
Fans have also been receiving teaser boxes embellished with the words 'Heaven Won't Be The Same'
“It would be me, Niall, Ed, Elton. Who else? That’s a good foursome"
The pair linked up with local busker Jacob Koopman to play a handful of hits, including their jaunty take on Coldplay’s ‘Yellow’