Teen superstars are nothing new. Melanie Safka snuck out of Woodstock in 1969 with a herbal mixture of idiot savante poesy and vaguely salacious fare like “Brand New Key”. Sweet to the point of twee, then, the woman-child now makes Jewel sound like Annette Peacock. You’ll need a strong constitution to persist with “Elements” and the totally unnecessary attempt at U2’s “I Still Haven’t Found What I’m Looking For”