Who sings jakes part for the two and a half men theme song?

In the "Two and a Half Men" theme song, Jake's part is sung by actor Angus T. Jones, who played Jake Harper on the show. However, the original theme song, "Men, Men, Men, Men," is performed by Charlie Sheen as his character, Charlie Harper. The song features a catchy tune and humorous lyrics that set the tone for the sitcom.