julia roberts and tom hanks flopped in "larry crowne" and jim carrey flopped in "mr.d movie stars but also in the right movie. the concept needs to be key and the concept with "cowboys and aliens" was a little bit fuzzy. "bridesmaids" didn't have huge movie stars but its concept was crystal clear, looking at the title and looking at the poster and commercials. >> "the hangover 2" ensemble casts. >> thank you. >>> 30 years of mtv, coming up next. ♪ video killed the radio storm >> starting with the very first video, changed the music and ,,,,,,,,,,,,,, >>> mtv turns 30 today. we asked some people who have been involved since the beginning to tell us why it became such a mover and a shaker. ♪ ♪ video killed the radio storm >> video didn't kill the radio storm. mtv made radio bigger and better. >> it was the first national radio station. before mtv chances are you didn't know what a major star looked like. madison square garden they were little ants on the stage. >> where would the world have seen the duran, dur ans, bon jovis, guns n roses, christina aguillera, madonna.