shontelle layne (born october 4, 1985), or just shontelle, is a barbadian singer-songwriter. she mainly performs r&amp;b, pop and reggae music. she released her debut album "shontelligence" in 2008 and her second album "no gravity" in september 2010. some if her recent songs achieved only modest success. she co-wrote "man down" by r&amp;b singer rihanna in 2010.