Charlie Sheen led about 100 fans on a walk from Toronto's Ritz-Carlton hotel to Massey Hall Friday evening for an awareness and fundraising walk for bipolar disorder.

Despite once claiming his only affliction is "bi-winning," Sheen invited fans to participate in the walk on Twitter after his Thursday night show at Massey Hall.

His spokesman Larry Solters is calling it a "spontaneous decision."

A large crowd had gathered at the Wellington Street hotel by the designated start time of 6 p.m., but the walk did not begin until about 6:45 p.m.

Dressed in a Toronto Maple Leafs shirt and a toque, Sheen appeared on the street before addressing members of the crowd for several minutes and leading them down the street.

The group made the 1.7-kilometre trek to Massey Hall, where Sheen is scheduled to begin the second Toronto show of his Violent Torpedo of Truth tour at 8 p.m.

Much like the rest of Sheen's tour, his Thursday night show was met with mixed reviews from fans and curious onlookers, many of whom paid more than $80 to watch the troubled star perform alongside Canadian comedian Russell Peters.

Sheen stepped outside for several smoke breaks during the performance, and at one point was joined on stage by a North York woman who said watching him on "Two and a Half Men" helped her get over her husband's death.

It's not clear what prompted the walk, but Sheen said he will use it to raise money for the Calgary-based Organization for Bipolar Affective Disorder. He has also promised to match all donations made to the charity on Friday through

Sheen has a long history of drug abuse, trouble with the law and erratic behaviour, and was fired from his hit sitcom last month. He has also faced allegations of domestic assault, spending Christmas 2009 in jail after an alleged attack on ex-wife Brooke Mueller.

The 21-city tour began April 2 in Detroit. It arrives in Vancouver on May 2.

With files from The Canadian Press