Lady Gaga loves spending time with her BF, 'Chicago Fire' star Taylor Kinney. She rocked a green bob while hanging out with Kinney's castmates in the Windy City, spreading some holiday cheer.

Actress and Kinney castmate Lauren German posted the photos of the lovebirds on her Instagram account. When Gaga and Kinney are cheek-to-cheek, they look so adorably in love. Gaga is clearly happy when she is with Kinney, something she discussed when she visited Howard Stern's radio show upon the release of 'ARTPOP.'

Gaga has rocked green-hued hair before. This is not a color that is found in nature and it's not exactly Christmas green. But it's unique, like most of Gaga's looks.

Oh, and in other Gaga news, Ma Monster's collabo album with Tony Bennett has been delayed. It was said that the album would be out in Jan. 1, 2014. It has now been bumped to late next year, according to Bennett. He reveals the delay at the 4:55 mark of this video. 'Cheek to Cheek,' per Bennett, is "a big swing album" and the crooner gushed over Gaga, citing her creativity and calling her his friend.

Lovebirds!

More love... Gaga's great, sculpted eyebrows, doesn't she?