It's been a popular few months for real-life celebrity couples dropping into each other's music videos.We had Kanye West and Kim Kardashian humping into the sunset for his car-crash (or should that be bike crash?) 'Bound 2' video, and now John Mayer and Katy Perry have gone at it on a mechanical bull for their duet 'Who You Love', while Beyoncé and husband Jay-Z indulged in a few glasses of wine on the beach for 'Drunk in Love'.But roping in your other half to star alongside you in a music video is nothing new, and it turns out that Kimye aren't even the worst offenders! Here, Digital Spy runs down our top 6 celebrity video hook-ups…Britney Spears and Jason Trawick in 'Criminal'Several moments in Britney's unmemorable 2011 video are enough to (almost) put Kimye to shame. With a hell of a lot of snogging and an 18-rated shower scene, Britters' then-boyfriend Jason Trawick starred as a criminal knight in shining armour who, despite his lax attitude towards committing GBH at a swanky party, she was more than happy to run away with...Jason Derulo and Jordin Sparks in 'Marry Me'According to Jason Derulo, being married isn't about letting yourself go and squabbling about whose turn it is to take the bins out. It's about spending all day in bed and letting your other half write 'I love you' in flour on your chest. At least that's what Jason's video for 'Marry Me', which was released last month and featured numerous plugs for all sorts of brands, has us believe. His sultry co-star was real-life girlfriend Jordin Sparks. Mariah Carey and Nick Cannon - Love StoryThis music video begins with the words 'This is the Love Story of Nick and Mariah', so we don't have to tell you what a gratuitous and soppy ode it is. The lyrics serve as a 'screw you' to critics of their relationship, which has been cemented by Nick having a GIANT tattoo of his wife's name on his back (it features at the end). We just hope that hot tub was thoroughly scrubbed down afterwards. Enrique and Anna Kournikova in 'Escape'OK, this is slightly cheating, as Enrique and Anna actually met while filming this video. The Russian tennis ace and former Biggest Loser trainer signed up to star alongside Enrique in his video for 2003 hit 'Escape', and the pair ended up dating for a whopping ten years afterwards!