Taylor Swift: Holly Humberstone feels like 'the coolest person'

Getty ImagesHolly Humberstone won the Brit Awards' Rising Star prize in 2021How does it feel to open for one of the world's biggest pop stars in front of a crowd of 90,000 people? Holly Humberstone has the answer. Or at least she will soon."It's a strange mix of nerves and pure, pure thrill."The 24-year-old is supporting Taylor Swift at Wembley Stadium on Friday as the superstar returns to London for a second…