The reality star and son Sean Preston take a spin on a merry-go-round in Canoga Park, Calif. Plus: Penn Badgley, Jay-Z & Alicia and more

COVER GIRL

Ellen DeGeneres debuts her clever Halloween costume – a made-up cover of O Magazine! – during her talk show on Thursday. The comedienne is set to appear alongside Oprah Winfrey on the actual magazine cover in two weeks, but that photo has yet to be revealed.