Sharon Osbourne has apologized for "getting a cheap laugh" at Susan Boyle's expense.
Last week, Osbourne, 57, slammed the "Britain's Got Talent" runner-up, 48, on a radio show for being hit by "the ugly stick."
Now, Osbourne writes on Twitter, "Susan Boyle is a lovely gracious woman and I took advantage of that by poking fun at her. I would never want to be responsible for hurting Susan, and I must apologize for getting a cheap laugh at her expense."
Boyle performed on "America's Got Talent" -- the show in which Osbourne is a judge -- in September. Her debut album, "I Dreamed a Dream," drops on Nov. 23.