Serena Williams dancing on the pitch during Kendrick Lamar's Super Bowl Halftime Show performanceKendrick Lamar’s performance at the Super Bowl Halftime Show over the weekend was full of surprising moments – but none were as big as Serena Williams’ unexpected cameo.Towards the end of Kendrick’s 13-minute medley, the tennis legend popped up for a surprise appearance where she performed the crip walk to Not Like Us, a diss track aimed at her rumoured ex-boyfriend, Drake.While Drake has not spoken publicly about Kendrick’s performance, or Serena’s guest appearance, he did appear to allude to it with