Five years have passed since La Roux owned the charts with "Bulletproof," during which time vocalist Elly Jackson endured vocal problems and the departure of collaborator Ben Langmaid. Now she's released Trouble in Paradise, which, despite its ominous title, is full of vibrant, sun-splashed rhythms. Indeed, the rebooted La Roux was worth the wait. Whereas the group's debut succeeded on the strength of its icy throb and aggressive sentiments ("I'm going in for the kill!"), Trouble proves that Jackson is human after all, infusing her sound with ska, reggae, and the exuberant '80s pop of groups like General Public and Missing Persons. "Kiss and Not Tell" is effervescent electro, while "Tropical Chancer" features slinking guitars à la Nile Rodgers. Past and present collide on "Silent Partner," a pulsing reminder that Jackson remains bulletproof when it comes to riling up a dancefloor.