Rascal Flatts will be performing at the PPL Center in Allentown on Sept. 26 and their opening acts are two TV singing competition alums Kellie Pickler and Danielle Bradbery, The Express Times reported.

After finishing in sixth place on the fifth season of "American Idol," Pickler signed to 19 Recordings and BNA Records and went on to have several hits including "Red High Heels," "I Wonder," "Didn't You Know How Much I Loved You" and "Best Days of Your Life."

In 2013, Pickler won the sixteenth season of "Dancing With The Stars" with Derek Hough and released her fourth album "The Woman I Am.'

On the other hand, Bradbery won the fourth season of "The Voice" at the age of 17 making her the youngest contestant to win the NBC singing competition.

Dubbed by her "The Voice" coach Blake Shelton as "the most important artist to ever walk across The Voice stage," Bradbery currently has a chart-topping single titled "The Heart of Dixie" and is on tour with Hunter Hayes.

Prior to opening the Rascal Flatts concert, Bradbery has also opened for Brad Paisley's "Beat This Winter Tour" and appeared on Shelton's "Ten Times Crazier Tour."

After the PPL Center's opening with The Eagles on Sept. 12, the Rascal Flatts concert will be the first country concert for the hockey arena.

In June, it was announced that the Rascal Flatts concert at the PPL Center will be opened by Grammy Award winner Sheryl Crow and the country group Gloriana but was cancelled just a day after the announcement, according to Allentown Morning Call.

Currently, Rascal Flatts are touring the United States to promote their ninth album titled "Rewind."

Meanwhile, the members of the best-selling and award-winning country band Jay DeMarcus, Gary LeVax and Joe Don Rooney recently signed on as official spokespeople for the heartburn relief brand Nexium 24HR , which is an over-the-counter acid blocker, Pratt Tribune has learned.