Quadron introduced viewers to its smooth and intimate sound last night when the Danish duo made their debut on the Late Show with David Letterman, where theyperformed "Hey Love." Singer Coco O. swayed and clapped in rhythm to the soulful tune in a crimson pantsuit adorned with black embellishments. At one point, the singer's blazer slipped effortlessly off her shoulders for an effect as delicate and intimate as the song itself. Understated vocals and swirling piano coupled with low lighting and three back up performers made way for an energetic, emotional and entrancing performance. Quadron recently released their second album, Avalanche.