. . . and Justin Timberlake!
After Cameron and Alex began hooking up in May 2010, Us Weekly reported that Kate was "pissed" and thought it was "payback" for when she hooked up with Justin Timberlake in January 2007, just days after he and Cameron broke up after four years of dating. Cameron and Kate seemed to patch things up, though, as they were seen hanging out at the Vanity Fair post-Oscars bash in 2012, and in a 2013 sit-down with Interview, Cameron referred to Kate as her "good friend."