Taking to social media, Lily, 35, shared a string of snaps from every time she has performed at Worthy Farm throughout the years.
Rocking bright pink hair and a golden and pink dress, the BRIT Award winner could be seen beaming away as she performed at the iconic music event in 2014.
A second shot saw her going braless for a cheeky backstage shot in which she playfully posed up a storm for the camera.
Speaking frankly, Lily captioned the shot: “And here’s me at Glastonbury in 2014 just before things really started to fall apart.
“It’s hard for me to look at these but I feel like I’ve come so far since then and I am so much happier and healthier.”
During Glastonbury 2015, Lily was pictured collapsed on the floor of the VIP area sparking mass concern.
An onlooker at the time told The Sun: “She was out of it, she didn’t know where she was.
“Her friends were saying, ‘You all right?’ and trying to give her water.
“Her eyes were rolling and her chin was moving from side to side, chewing constantly.”
Another onlooker added to the publication: “She was in the recovery position and two security guys were talking to her.
“It looked like they were trying to get people away from her. She looked in a bad way, she was pretty f*****.
“Before that I saw her staggering around looking haggard and out of it.”
Lily has spoken frankly about taking drugs in the past – admitting to using both ketamine and cocaine throughout her career.
She has also claimed she took illegal substances at Glastonbury when she was just 13-years-old.
In May 2018 Lily took to Instagram to share a throwback snap of her being carried out of the 2008 Glamour Awards in a ‘K-hole’ after snorting a line of ketamine she thought was cocaine.
In August 2018 Daily Star Online exclusively revealed how Lily had collapsed backstage at Boardmasters Festival following her set.
A source told Daily Star Online at the time: “Three girls got to meet Lily backstage.
“She was really lovely to them, but off her face.”
“She went back and forth past them a few times and then just collapsed and lay on the floor for about 10 minutes.
“Lily then got up and left.”
A backstage onlooker added: “After Lily came off stage she briefly met three fans.
“She posed for a group picture and chatted and hugged them before heading to the bar.”
Meanwhile, one of the girls in question was overheard saying: “It was really cool… I wanted to meet her.
“I was crying [with happiness]”
“She was really lovely, but she’d clearly been drinking.”
During Lily’s set she boasted about having casual sex all over the globe, bizarrely sang nursery rhyme Old MacDonald Had A Farm and laughed about her relationship with alcohol.
Speaking frankly about her love of a drink during, Lily said: “I haven’t been around for four years as I’ve been getting divorced and developing quite an unhealthy relationship with alcohol.”
The chart-topper added: “I’m actually not drunk I’m just drunk on the air of you guys.
“I kind of feel like you guys are drunk.
“Are you guys drunk? You guys are drunk.
“See that is why I want to have a drink… I want to get on that level.”