>> march 7th, 2010, houston, texas. the annual houston livestock show and rodeo is in full swing. >> it's an all-encompassing entertainment extravaganza that's not for profit. it benefits youth education. >> the event has been going strong for more than 75 years. it's a texas tradition that features lone star staples like great music, down-home cooking, and of course, a top-notch rodeo. >> we're the largest fair event in north america, the largest rodeo in the world. >> scott and denise barrett have been taking their 12-year-old daughter sarah marie to the event for years. on this date, sarah marie is especially excited for the headline music act. >> we went to the rodeo to watch the jonas brothers. i'm a big jonas brothers fan.