During the second night of Bilbao BBK Live 2026, Robbie Williams made an unexpected stage appearance to join Irish artist CMAT's performance. Having already performed as the festival's headline act earlier in the evening, Williams rushed on stage during CMAT's late-night set on the Repsol stage, where they performed his classic track 'Angels' together, delighting the assembled crowd.

The collaboration highlighted CMAT's rising prominence in the music industry following her recent achievements with the album 'Euro-Country', which secured the Best Album award at the Ivors 2026 and was shortlisted for the Mercury Prize. The artist has also drawn attention for her advocacy regarding online harassment, having recently addressed body-shaming comments she received following a summer festival appearance.