Blue Bloods

Can't say we saw this piece of casting news coming: Tony Bennett and Carrie Underwoood will guest star on the season premiere of Blue Bloods.

The best-selling artists will portray themselves, performing a duet of “It Had To Be You” at a fundraiser that Frank and Erin attend in honor of new the mayor (David Ramsey).

“Having musical legend Tony Bennett and the hugely talented country music star Carrie Underwood perform on our show is a true gift,” producer Leonard Goldberg said 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 [they] can be a part of it.”

This premiere will air on September 23.