While working at Jarrold's in 2009, Burr copied the advice of makeup artist and sister-in-law Samantha Chapman and created a YouTube channel. Burr left her job two years later to focus on her YouTube channel. Her earliest videos showed viewers how to recreate celebrity makeup looks. She later began making videos about fashion, style, and baking. Over the years, Burr has collaborated on videos with other YouTubers, including Zoe Sugg, Louise Pentland, Alfie Deyes, Tyler Oakley, and Joe Sugg. In December 2015, she appeared on the cover of Glamour UK, and the cover of Stylist in November 2016.