5 Big Celebrity Feuds Katy Perry and Taylor Swift join the list By Evann Gastaldo, Newser Staff Posted Sep 13, 2014 12:51 PM CDT 10 comments Comments Debbie Gibson, left, and Tiffany perform on ABC's Good Morning America in New York, Friday, July 29, 2011. (AP Photo/Charles Sykes) (Newser) – We learned this week that there's apparently no love lost between Taylor Swift and Katy Perry. HLN rounds up nine more of the biggest celebrity feuds: Orlando Bloom and Justin Bieber actually got into a physical altercation at a restaurant recently, and it was allegedly over Bloom's ex, Miranda Kerr. Britney Spears and Christina Aguilera were on the Mickey Mouse Club together as kids, but were always rumored to be rivals, especially after Spears supposedly caught Aguilera embracing Brit's ex, Justin Timberlake. Denise Richards said in an interview that she and Heather Locklear were no longer friends, and that she once hooked up with Locklear's soon-to-be-ex-husband. Lil' Kim and Foxy Brown wrote mean lyrics about each other, and in 2001 their entourages got in an argument that ended with gunfire. Tiffany and Debbie Gibson both had '80s hits at the same time, and they were rumored to be rivals at the time, though Gibson later denied it. Click for the complete list.