alberto perlman calls a fitness concert. >> we want to take this on the road. to take this to vegas. why not exercise while you're in vegas at night, or a standing show in new york, we want to have these shows go on tour. >> reporter: it's the latest idea from the creators of the zumba empire, which includes everything from d.v.d.s to video games and a clothing line. but perhaps the empire's biggest winner is the music business. >> we really like working with pitbull. he was the first one to see that we have a 14 million people taking classes every single week station and i can promote my music through you guys and those 14 million people can not change the dial. of those 14 million people in zumba classes, half are in the u.s. >> reporter: the company started a decade ago when perlman met beto perez. >> it was that ah-ha moment where the entrepreneur in me said, this needs to be scaled. >> reporter: and scale it has. it's been called the zumba economy. edmee cherdieu dalexis has been teaching zumba for four years. today, she co-owns five zumba studios around n

it was a much colder day four years ago when cellist yo-yo ma and violinist itzhak perlman used prerecordedesident obama's first inauguration, and whitney houston lip synced her famous rendition of the "national anthem" before the 1991 super bowl. no doubt fans will watching closely when beyonce performs at this year's halftime super bowl. we know what we heard was a tape, the musicians apparently mimicking the movements of their instruments. we're still waiting to hear a response from beyonce's representative. >> fake or real, it was still good. >>> straight ahead your wednesday morning business headlines. and in sports serena williams' racket won't be coming home from the australian open but will she? find out if the superstar advanced to the semifinals. exion® deep wrinkle night cream. it's clinically proven to give 10 years back to the look of skin. now for maximum results... the power of roc® retinol is intensified with a serum to create retinol correxion® max. it's proven to be 4x better at smoothing lines and deep wrinkles than professional treatments. new roc® retinol correxion® max

fanfare sounds] ♪ >> it is my pleasure to introduce the unique musical performance of violinists itzhak perlmannd applause] >> it is my distinct honor to present the chief justice of the united states, the honorable john roberts was administered the oath of office. everyone, please stand. >> are you prepared to take the oath, senator? >> i am. >> i, barack obama, do solemnly swear that i will execute the presidency of the united states and will to the best of my ability preserve, protect, and defend the constitution of the united states so help me god. >> congratulations, mr. president. [cheers and applause] [fanfare sounds] ♪ [playing "presidential march"] [cannons firing] [cheers and applause] >> it is my great honor to present the 44th president of these united states, barack obama. [cheers and applause] [crowd chanting "obama"] >> thank you. thank you. my fellow citizens, i stand here today humbled by the task before us, grateful for the trust you have bestowed, mindful of the sacrifices borne by our ancestors. i thank president bush for his service to our nation, as well as the generosity

itzhak perlman and yo-yo ma played air violin and cello at obama's first inaugural. enough that day to snap their strings. ♪ oh beautiful >> reporter: yesterday was cold enough to worry james taylor. ♪ for amber waves of grain >> it's always hard for a guitar player to play when it's cold, because your hands sort of stiffen up. you know, i was very relieved to have gotten through it without any major train wrecks. ♪ above the fruited plain >> reporter: late today, facing a train wreck of bad p.r., the marine corps band revised its earlier statement. "no one in the marine band is in a position to assess whether beyonce's performance was live or pre-recorded." an inauguration is supposed to be history, not showbiz. and history is rarely perfect. david wright, abc news, los angeles. >> and it is a mystery tonight. >>> coming up, some good news about our own barbara walters. but with i'm breathing better. so now i can be in the scene. advair is clinically proven to help significantly improve lung function. unlike most copd medications, advair contains both an anti-inflam

applause] [fanfare sounds]♪ >> it is my pleasure to introduce the unique musical performance of itzhak perlmanony mcgill. [cheers and applause] arranged for this occasion by john williams. ♪ ♪

alberto perlman. norah says she takes your class. it's sexy and it's challenging.class and the reason we created it and the zumba company is they saw something they did not know existed. i saw fitness without sacrifice. people smiling, cheering laughing and sweating. >> at the same time. how did you come up with the name zumba. >> so the world rumba in spanish means to party and we wanted something that rhymed. we went through the alphabet. we were getting nervous. zumba sounded like what it was. >> when i look at you, you look like a businessman. you don't look like you do zumba. >> i do the video game. i do the video game with my kids. it's an amazing experience. i do it. of course, i do it. >> the thing that's cool about it. you talk about kids because kids can really dance before they can talk. grandma can do it. people of any age can do it. >> yes. we have a zumba kids class. zumbatomic. zumba gold class for grandma. zumba tone class with dumbbells. one uses a chair as a dance partner. >> it covers everything. >> everyone and everything. >> you know alberto, z