Porn star Gigi Dior is reacting to a recent defeat in court at the hands of Christian Dior … telling TMZ it’s no sweat off her back because she’s used to Big D giving her the shaft.

The adult film actress just finished a years-long legal dispute with the French fashion house after she tried to trademark her stage name … Dior sued her, and now she won’t win the rights to “Gigi Dior.”

Gigi tells TMZ … she knew the odds were against her in her legal war with one of the richest people in the world, Dior owner Bernard Arnault, and while she doesn’t agree with the court’s decision, she respects it and is taking it in stride.

Christian Dior successfully argued Gigi was tarnishing their reputation by using “Dior” in pornography … but Gigi tells us she has NO plans to change her stage name.

Sabrina Carpenter is known for her provocative shows, but she put on a nearly X-rated concert Monday night in Paris, where she simulated a three-way sex act onstage.

The singer performed some of her biggest hits in front of a packed crowd at the Accor Arena in the French capital — but when she belted out her hit “Juno,” Sabrina did her customary imitation sex act — but this time she didn’t hold back one bit.

Sabrina paid homage to Paris’ most famous tourist attraction, the Eiffel Tower, by imitating the sex position known as, you guessed it, the Eiffel Tower with two of her male dancers.

Like we said, pretty provocative stuff … but that’s par for the course for Sabrina … however, the raunchy three-way was a nice new touch. We’re sure her gazillion fans lapped it all up.

The iHeartRadio Music Awards are about to start in Los Angeles and some of the biggest names in music and reality TV are arriving … and we’ve got all the photos.

Kelsea Ballerini, Jojo Siwa and Benson Boone are some of the first arrivals … and they are all looking super fashionable … with Jojo really making a statement.

LL Cool J is tonight’s host at Hollywood’s Dolby Theater … and GloRilla is among the performers. She showed up in a skintight, black dress and blonde hair.

Music is the reason for the occasion, but this is Hollywood and reality TV is not to be ignored … so “Vanderpump Rules” stars Ariana Madix and Brittany Cartwright are among the celeb guests in attendance.

Jenny McCarthy is in the house too … and like a fine wine she just keeps getting better with age.

Green Day is nominated for three awards … Alternative Artist of the Year, Rock Artist of the Year and Alternative Song of the Year for “Dilemma” … and they look ready for an acceptance speech … we’ll see if they win.