Ciara’s late arrival at Givenchy may have irked photographers, who booed her for delaying the start of the show, but the R&B singer was determined to enjoy time out from her grueling studio schedule. “I’m so happy I was able to be on time — well, sort of,” she offered. “I’ve been finishing my album.” Stella Tennant, who also sat in the front row, said she’s been delighting in “just regular family life, the chickens, the dogs….I just came to Paris for an injection of chic.” Meanwhile, Lou Doillon’s eight-year-old son, Marlowe, and teen blogger Tavi Gevinson helped lower the average age of the front row. Gevinson, sporting blue hair, said she was covering the shows for Pop magazine, which recently featured her on its cover. Wearing a studded Givenchy blouson, Joanna Preiss said she is working on a new album due out later this year. The French actress crossed the Channel for the English-language film “We Are the Industry.” “Luckily, I play a French person, so I don’t have to work on this accent,” she said.