The former X Factor winner, who is now appearing in The Bodyguard in the West End, is a regular at the exclusive Virgin Media Louder Lounge so we weren't surprised when we spied her enjoying the uber glam VIP area once again this year!
As always, the star dressed to impress, turning up on the sweltering first day clad in a pretty white summer playsuit. Look familiar? That's because Little Mix's Perrie Edwards has also been seen in this little Tiger Mist number, available at ASOS for £42.
While temperatures at the Hylands Park, Chelmsford leg of the festival hit 30 degrees on the Saturday, the next day was a different story as the skies opened and we all got very, very wet!
Alex dressed for the showers in ripped jeans, willies and a raincoat… but kept that slice of superstar cool with a sheer shirt showing her black bra underneath.
While she waited for the rain to stop, the 'Hallelujah' singer stopped by the Scope Swap Shop in the Louder Lounger, which had the tagline: "Just share it to wear it!" Scope is the UK's leading disability charity that gives a voice to 11 million disabled people. It also helps them live more independently and get better access to education and work.
Oh, and being a celebrity, Alex didn't have to get the train to the festival: she was driven there in a brand new smart forfour car. Lucky thing!
Alex later told fans she'd had the "best weekend" at the Louder Lounge and it was the perfect way to kick off her birthday celebrations, ahead of turning 26 today.