Carrie Underwood will play herself alongside crooner Tony Bennett, who will also play himself, on the season premiere of the CBS cop drama 'Blue Bloods.'

Underwood and Bennett won't be getting arrested or be under investigation when they make their 'Blue Bloods' cameos. At least we don't think they will! Rather, this terrific twosome will be performing their rendition of 'It Had to Be You' at a fundraiser ,which will be attended by series characters Frank Reagan (Tom Selleck) and Erin Reagan-Boyle (Bridget Moynahan).

This isn't the first time Underwood and Bennett have performed the song, as they recorded it for Bennett's 'Duets II,' which lands in stores on September 20. This is just the first time the duo will perform it on a cop-themed TV show.

"Having musical legend Tony Bennett and the hugely talented country music star Carrie Underwood perform on our show is a true gift. The talent that they bring together is amazing," series executive producer Leonard Goldberg says in a statement. "We're looking forward to an exciting second season premiere with a story that is certain to provoke debate, and are thrilled that Tony and Carrie can be a part of it."

Now we have two reasons to tune in: the Underwood/Bennett duet and the provocative storyline.

The second season of 'Blue Bloods' kicks off on September 23, so be sure mark your calendar and watch.

Watch a Clip of Carrie Underwood and Tony Bennett Singing 'It Had to Be You'