FLO made their television debut this week, bringing viral single ‘Cardboard Box’ to Jimmy Kimmel Live! – watch the performance below.The track, which was released earlier this year and features on the girl group’s debut EP ‘The Lead’, was written alongside the Grammy Award-nominated MNEK.Discussing the process of working with him on the song during a recent NME Radar interview, the band’s Stella said: “It was more about watching him do his craft and taking it in. He wanted us to be our best, melody and writing wise.