 He scored 20 goals in 39 appearances in all competitions in the 2009–10 season, including 19 in 35 in the league, where he finished as third-top goal scorer behind Peter Whittingham and Nicky Maynard who both scored 20.In 2012, Scunthorpe United fans voted Hooper as the club's best ever player.On 26 July 2010, Scottish Premier League club Celtic signed Hooper for £2.4 million.