"'Boy don't you know you can't escape me, ooh darling cause you'll always be my baby'," Lambert captioned the photo. "I got to spend heart day with great people playing great music.

"Thanks Anderson East and your sweet band for letting me and Gwen Sebastian sing some Mariah with y'all!" She hashtagged the pic "Beer and Microphones," "Valentines" "Massachusetts is Freezing" and "We're With the Band." See the post