One of the most soothing voices in the music world, Maroon 5's Adam Levine checks in this list at number four of the best pop singers in the world. With a high pitched voice and a die hard fan base full of grown ladies throwing themselves at him, Maroon 5 is a lucky man, and a lucky singer, as he has risen to fame in the last two years. With credible songs and an amazing voice, Maroon 5 is challenging every pop singer with his new album: Overexposed. Daylight and Payphone are two songs which have done wonders for Maroon 5, and Love Somebody is steadily helping Maroon 5 too. Overall, Maroon 5 has done enough to become one of the best in the music industry.