Katy Perry: Sunny Day, Sweepin' The Clouds Away...

Katy Perry and her fiance, Russell Brand, go on a walk together on Sunday at L.A.’s Griffith Park.

The 25-year-old singer shared on her Twitter that she recently visited Sesame Street and will appear on an upcoming episode!

The best part, according to Katy, was getting to wear a Grouch snuggie. “I’ll b VERY GROUCHY in this!” she wrote.

FYI: Russell‘s aviators are John Varvatos Eyewear style V741!

15+ pictures inside of Katy Perry and Russell Brand taking a walk in Griffith Park…