The Montreal quartet TOPS are connoisseurs of simple expression. For about five years now, they’ve written swaying, modest pop-rock ditties with little more than buttery guitar, spare drums, and vocalist Jane Penny's fluttering coo. The band's latest single, a lovesick groover called “Petals,” finds them again crafting poignant hooks with just the bare essentials. Penny describes a night spent alone with painful memories and dashed hopes, a classic scene that would verge on cliché if not for her veiled prose (“Make it worthwhile/Inheritor of the shade”) and the way she lets out each intimate phrase like a sigh. Once Penny’s had enough, lyrical guitar wraps up her injured reminiscing with the slightest hint of sweetness, bringing “Petals” to a close just as quickly and effortlessly as it began.