Jessica Simpson mistaken for rival Carrie Underwood

Following lunch with pals at Dos Caminos in NYC’s SoHo on June 11, Jessica Simpson , 27, returned to her hotel, where a girl asked for her autograph.

“She said she was her number-one fan from back in the Idol days,” an eyewitness tells OK!. “Jessica smiled politely and didn’t correct her, and she started to laugh when the girl asked how she was doing since her devastating split from Chace [Crawford].”

“She wasn’t pleased that the girl had no clue who she was!”

Image WENN