Watch: Beiber's roast teaser, Michelle Obama's dance on 'Billy on the Street' and more

Teaser for Comedy Central's upcoming roast of Justin Bieber was unveiled on both the TV channel and social media platforms on Tuesday. Bieber's roast is scheduled on premiere on March 30th. And, Michelle Obama danced with Big Bird on 'Billy on the Street' to promote healthy eating. Also, UK's Prince Charles and Duchess of Cornwall give royal seal of approval to 'The Second Best Exotic Marigold Hotel.' The royal family joined the stars of the movie at the world premiere in London. The film is the follow up to 2011's suprise hit, "The Best Exotic Marigold Hotel".