The female muppet split up with the male muppet so that they could sell their story to yet another inane "celebrity" gossip magazine read by the likes of your good self. This lines their muppety little pockets. In a few weeks they will get back together, or have a baby, or a nervous breakdown, or a particularly traumatic in growing toenail or best of all a new hairstyle!!!!! or some other attention seeking load of old sh1te and guess what they'll sell their story about it again, and you'll line their muppety little pockets again!
Simple.