Dick Clark's death: Celebrity reactions

16 of 20: Dane Cook Tweeted, 'Rest in peace Mr. Dick Clark. Thank you for new years and new years of class, positivity & entertainment.'

The comedian is known for his stand up comedy, as well as films as 'Good Luck Chuck' and 'Employee of the Year.'

(Pictured: Dane Cook performs comedy at the 'Comic Relief' event in Las Vegas in November 2006.) (flickr.com/photos/dlanger)