Hilary Duff is an O'Hare 'Elixir'

Hilary Duff is a sight for sore eyes at Chicago’s O’Hare International airport on Saturday (October 16).

The ‘So Yesterday’ singer was en route to her next book-signing appearance. Hilary, 23, has been busy jetting cross country promoting her new book, Elixir. Hubby Mike Comrie was back in Pittsburgh on Friday (October 15) skating for the Penguins.

Hilary‘s new young adult novel tells the tale of Clea Raymond and her intense bond to a mysterious man who enters Clea’s life after the disappearance of her father.