Thousands of people packed into CityWalk at Universal Orlando Monday for a concert by One Direction who performed without band member Zayn Malik.

The concert was held in conjunction with the Monday release of their new album “Four.”

Niall Horan, Liam Payne, Harry Styles and Louis Tomlinson performed without Malik who they said fell ill before they left London.  #GetWellSoonZayn started trending on Twitter.

Over the weekend One Direction joined Bono, Ellie Goulding Coldplay's Chris Martin, Sinead O'Connor, Rita Ora, Ed Sheeran and Emeli Sande to record a new version of the Band Aid charity single "Do They Know It's Christmas?" which was first recorded 30 years ago to raise funds for famine relief in Ethiopia.