Donnie Klang’s rocket ride to stardom has come so fast, he hasn’t had the time to let it sink in yet. A little more than a year ago, Klang was working in a warehouse and going to business school, thinking seriously about abandoning his dreams of being a singer after two failed “American Idol” auditions and years of struggling with little to show for it. He auditioned for Sean Combs’ MTV reality show, “Making the Band 4,” on a lark and was shocked on live television last August when he wasn’t selected to become part of the group assembled, Day26, but instead received a recording contract as a solo artist with Diddy’s Bad Boy Records. On Tuesday, only a year and a week after his selection, Klang’s debut, “Just a Rolling Stone,” will hit stores and, with Combs’ backing, has a legitimate shot at No. 1.

Donnie Klang’s rocket ride to stardom has come so fast, he hasn’t had the time to let it sink in yet.

A little more than a year ago, Klang was working in a warehouse and going to business school, thinking seriously about abandoning his dreams of being a singer after two failed “American Idol” auditions and years of struggling with little to show for it.

He auditioned for Sean Combs’ MTV reality show, “Making the Band 4,” on a lark and was shocked on live television last August when he wasn’t selected to become part of the group assembled, Day26, but instead received a recording contract as a solo artist with Diddy’s Bad Boy Records.

On Tuesday, only a year and a week after his selection, Klang’s debut, “Just a Rolling Stone,” will hit stores and, with Combs’ backing, has a legitimate shot at No. 1.