Sometimes a song falls together like magic. Singer Venus O’Broin says “I Know!” basically wrote itself, and you can tell, in the best way. Swapmeet’s debut single for Winspear seems to flow out of them, chugging along with a natural sense of purpose and propulsion. The hook, matching O’Broin’s vocals with a needling bit of ’90s guitar, is just one phrase repeated — “I know, I know, I know” — followed by the dam-breaking sound of the band rushing back in. It’s an acknowledgement that something’s not right, embedded a song where everything works together perfectly. —Chris