The PIECES OF ME singer, who made an appearance to promote her new movie Undiscovered, was asked by Leno to clarify reports she could burp the whole alphabet.
She responded, "I can't burp the alphabet, but I can burp. Would you like to hear it? I can burp on cue."
After Leno cautiously informed her he'd like to experience her unusual talent, Simpson let out a rumbling gaseous expulsion, prompting loud cheers from the studio audience.