The singer, who fronts Florence & The Machine, described how she was sat at home with her family when she saw her track Dog Days Are Over, being performed on Glee.
She told E! Online, 'I saw it over Christmas. It was like an amazing Christmas present. I was with my family and I was in my slippers and robe in our kitchen dancing around to it. I was so into it.'
Welch continued, 'It was like - this was a song I had written in a basement in a tiny studio in South London and now it's on Glee! It was surreal.'