Bruno Tonioli

In 2004, Tonioli became a household name in the U.K. as one of the judges of the reality competition series "Strictly Come Dancing" (BBC1, 2004-), the British version of "Dancing with the Stars." The following year, he also started appearing as one of the judges on "Dancing with the Stars," where he joined fellow "Strictly Come Dancing" judge Len Goodman and American dancer Carrie Ann Inaba. The flamboyant and wildly expressive Tonioli perfectly rounded out the personalities on the judging panel, complementing the direct and stern Goodman, and the charming and sympathetic Inaba. Tonioli often delivered some of the most talked-about critiques, including one that sparked a bitter feud between him and balladeer Michael Bolton, who was a contestant during the 2010 season. Bolton told People magazine that he expected an apology from the outspoken Tonioli after he called Bolton's jive "the worst he's ever seen." Tonioli never issued an apology, a move that even show's producers defended.