United Kingdom, Aug. 3 -- Olivia Dean was left "crying all day" before headlining her first festival in America on Saturday night (02.08.26).

The 27-year-old singer took to her Instagram page to share a video of herself on stage at Lollapalooza in Chicago, as she wrote: "My first time headlining a festival in America - 97,000 of you!! Truthfully I had been crying all day beforehand trying to process how we even got to this point.

"Thank you for sharing your love with me and thank you to everyone on my team who makes it possible for us to shine up there!!!!!"

Olivia concluded: "Love always!!!"

Lollapalooza commented on Olivia's post: "You are a STAR. Thank you for giving us EVERYTHING."

While her Rein Me In collaborator Sam Fender add...