You know it's the fall season when you see everyone wearing flannels and some of our favorite Hollywood stars have gotten on board with the plaid trend! Julianne Hough was spotted wearing a red plaid shirt paired with skinnies, a hat and black bomber! Cute! Kelly Clarkson chose a red plaid dress for a radio interview and singer Rita Ora and Katy Perry have also gone mad for plaid! Rita wore a red plaid suit with matching bow-tie to a party in London and Katy Perry has been seen wearing the print a ton this season! This is a trend we could definitely get on board with! Check out stars in plaid here!