Grammy-award winning singer-songwriter Ne-Yo shocked fans last night when he began to cry while on stage during a concert in Manchester, UK. Apparently, the crooner had been onstage for about an hour and just completed his rendition of Michael Jackson's 'Off the Wall,' before calling it quits due to illness.

The seemingly confused crowd cheered -- and some booed -- as the singer wept onstage and promised that he would make it up to them at a later date. "Trust me when I say 'I'll be back," Ne-Yo promised. "I will be back."

Watch the video after the jump.