Miranda & Brendan CHEWING THE FAT!

Wants to turn him into a chubby hubby

QUEEN-SIZED songbird Miranda Lambert is on a mission to bulk up her scrawny young hubby, Brendan McLoughlin, say insiders.

"She thinks Brendan is the cutest thing in denim she's ever laid eyes on, but he could stand to gain a few pounds," squeals a source.

"He's way too skinny to fit in with country folk, and Miranda is glad to help him!" Former New York cop Brendan, 31, is said to be willing to do anything to keep the 39-year-old Tin Man singer happy after three years of marriage, so he's all in on beefing up, spies say.