Two of Chicago house’s heavy hitters take time out from their 300-plus appearances each year to deliver the one-and-a-two for OM. Colette’s disc sparkles with bubbly vocals (including her own classically trained voice) on gems from Rockers Revenge, Greenskeepers, Bryan Jones, and label mates Andy Caldwell and Kaskade. Conversely, DJ Heather’s instrumental disc gets funky and deep and works texture with brisk beats from Mark Farina (with Kaskade), Dopeheadz, TradeMarq, Mr. Jones, and features her own delights like “Picture of You” as well.