Meatloaf, who featured on the couple's Christmas (11) cards, passed away on Sunday (01Apr12), and the Transformers star has paid a touching tribute to his canine pal on Twitter.com.

The actor writes, ""He was one of the kindest sweetest souls I've known. He'll be missed. RIP little buddy.""

The heartbroken Black Eyed Peas star retweeted the message to her followers.