“Trading Spaces” returns… Chloë Grace Moretz has an extreme fan… Harry Styles on SNL on April 15… John Legend’s stolen luggage… and Cheryl Burke to replace Abby Lee Miller on ‘Dance Moms’

Do you remember “Trading Spaces” on TLC? It was this show where neighbors would work with a professional designer and take over decorating a room in each other’s houses with only a $1000 budget. Well, “Trading Spaces” is coming back next year!! Some people are less enthused than others, but count me among the enthused! We don’t know yet if they’re bringing back any of the original show’s stars like Paige Davis or Ty Pennington or Vern Yip….Also, Discovery has announced it’s bringing back “Cash Cab.” And the Science Channel is giving us a new version of “MythBusters.”

Celebrities love their fans…..to a point. Some draw the line at having them show up at their doorstep, which is the case with Chloë Grace Moretz. She called 911 after a man on a skateboard went right up to her front door with a box of cookies he wanted to give to her. By the time police got there, he’d rolled on out of three. Neighbors reported that this young man — who was probably about 18 — had been skateboarding through the neighborhood, asking if he had Chloe’s address right. The LAPD’s threat management division is now looking into it.

Harry Styles teased us that he’s got new music coming out April 7. And now we hear Harry is going to be the musical guest when Jimmy Fallon hosts “Saturday Night Live” on April 15. Sources say Jimmy really wants to include Harry in a couple of the skits, giving him a chance to show off his comedic acting skills. He gets REAL heavy in the upcoming movie World War II movie, “Dunkirk.”

John Legend landed at JFK over the weekend and somebody stole his Louis Vuitton bag right off his luggage cart. Inside were some Cartier panther-head cuff links worth about $25K. But security cameras caught the guy who took it, and 63-year-old Agustin Hilario decided he’d go ahead and return the bag and everything in it to the police. But they still charged him with 3rd-degree grand larceny, criminal possession of stolen property and attempted grand larceny. He’s looking at up to seven years in prison for all that.

When Abby Lee Miller announced on Monday that she was quitting “Dance Moms” because she was tired of being treated like dirt by a bunch of men who’d never even taken a dance class, producers were like, eh. They decided they’d just keep filming without her. And boy, did they move fast!! They’ve already hired “Dancing With the Stars” pro Cheryl Burke to replace Abby and filming resumes TODAY.