Being a solo artist takes balls. Leaving behind one of the biggest bands, and taking the world by storm on your own? Not many can say they've tasted the success of being solo, but those that have, have gone on to produce, create, and star in some of the most popular songs of the 21st century.
Still, not everyone can remain a star. Those that tried and failed would either simply fade into obscurity, or would land themselves into different careers, some becoming fashion designers, others university professors, and even some would become contestants on reality tv shows.
Here's Gigwise's list of the 25 best and worst solo artists that gave it a go on their own.