The Backstreet Boys, a pop-culture sensation of the 1990s, have been added to the Indiana State Fair concert lineup.

The vocal group -- now a quartet of Brian Littrell, Nick Carter, AJ McLean and Howie Dorough following the exit of Kevin Richardson in 2006 -- will perform Aug. 10 at the Hoosier Lottery Grandstand.

The Backstreet Boys are on tour to promote their 2007 album "Unbreakable."

Tickets, $50, $45 and $25, go on sale at 10 a.m. May 30. Fair admission is included in the price of concert tickets.

Tickets will be available at the Indiana State Fairgrounds, 1202 E. 38th St., at Ticketmaster locations, by visiting www.ticketmaster.com or by calling (317) 239-5151.

Fair organizers also added an Aug. 11 performance by "High School Musical" cast member Corbin Bleu.

Admission to Bleu's Aug. 11 performance will be free with a voucher, which will be available at Web sites www.indianastatefair.com and www.voice.tv beginning June 9.

The Backstreet Boys and Bleu join a fair concert lineup that includes Carrie Underwood on Aug. 8, Daughtry on Aug. 9, Sugarland on Aug. 12 and the touring edition of "A Prairie Home Companion" on Aug. 13.