English-Irish band One Direction members surprised band member Niall Horan by breaking into an impromptu gig during a performance here and singing 'Happy Birthday' to him.
The band members -- Liam Payne, Harry Styles and Louis Tomlinson-- wished Horan with a song in the midst of a performance in Foxborough here on Saturday, reports mirror.co.uk.
Horan turned 22 on Sunday.
One Direction will now be on a break as they leave US heading back to London for the next part of the 'On The Road Again' tour, which starts on September 24.
According to sources, the band's last live concert will be on October 31 at Motorpoint Arena in Sheffield.