Sisters with CF perform on “America’s Got Talent”

September 8, 2010

Sisters Christina and Ali, who have CF, performed once again on last night’s “America’s Got Talent,” receiving unanimous praise from the judges.

On tonight's episode, which airs on NBC at 9:00 pm ET (8:00 pm CT), we will learn if the sisters move on to the final round of top four acts.

Watch last night’s performance.