Lonely (also called Mr Lonely) is a hip hop / soul song by Senegalese-American artist Akon, from his 2005 debut studio album, Trouble. It was written by Akon, Gene Allan and Bobby Vinton; and produced by Disco D.

The song was released as a single on February 21, 2005 and became Akon’s first worldwide hit. The single peaked at number four (4) on the US Billboard Hot 100, and reached the number-one spot in the UK, Australia, Germany, New Zealand, Denmark, Austria, Ireland, Netherlands and Switzerland.

Lonely has been certified 2x platinum in the US and Australia; platinum in Brazil and gold in the UK, Switzerland and Belgium.