Lol Jlo is a horrendous singer. Just like most of the pop stars today. The difference is she is an incredible dancer with outstanding stage presence to make up for it.
She's a terrible singer. Mediocre Actress. Great Dancer (By great I mean actually great, not Britney just kind of sort of okay great.)
I usually despise people who say they love Nirvana, but don't know any song other than SLTS. And even IF he's really such a "fan", it comes out so pathetic considering his unfamous quote that he's the Kurt Cobain of his generation, so... please.