The Cleveland Cavaliers are auctioning off the courtside chairs from Games 3 and 4 at Rocket Arena that celebrities Taylor Swift, Travis Kelce, Timothée Chalamet, Kylie Jenner, Ben Stiller, and Machine Gun Kelly sat in. The seats have been certified as genuine through The Realest's witness-based and tamper-proof TRuEST authentication system. The auction is being held on The Realest's website until June 14, according to a news release. Kelce, an Ohio native and Cavaliers fan, chugged a beer while standing in front of a seated Swift in an attempt to energize the Cavs' home crowd during Game 3. There's no word of any beer stains on Swift's and Kelce's seats. In Game 4, MGK playfully snatched a Knicks fan's hat from the second row and threw it to the floor. Chalamet, Jenner, and Stiller invaded Rocket Arena to support the Knicks for Game 4, with Chalamet hugging guard Jalen Brunson after New York completed the sweep. Other items being auctioned off include the Game 3 used basketball and the nets used in each Cleveland-hosted game from the Eastern Conference finals. The Cavaliers first announced their partnership with The Realest in February. The memorabilia company also has deals with the Philadelphia Eagles, MLS, the Big Ten, the MLB Players Association, and more. It was founded by Scott Keeney, better known as DJ Skee, and has sold other unusual pieces of memorabilia, such as $50 pints of snow from the Eagles' 2025 NFL playoff win over the Los Angeles Rams and a chair that Caitlin Clark sat on during a Big Ten Tournament game when she played for the University of Iowa that sold for $3,722 at auction in 2024. The Knicks, meanwhile, are auctioning off the chance to sit in two seats on Celebrity Row at Madison Square Garden for Game 3 against the San Antonio Spurs on Monday, with proceeds going to charity. The current bid is $500,000; the auction ends Sunday night.