Adele said that her "brutal" reaction when her Las Vegas residency was delayed earlier this year made her feel like "a shell of someone".
The singer cancelled her dates for January 24 hours prior to opening night and told fans that the show wasn't ready.
Adele spoke to BBC Radio 4's Desert Island Discs and said that she was "devastated" by her decision to postpone her three-month residency. However, she stated that she stands behind the decision.
She told her fans Friday that the shows would be rearranged soon.
Lauren Laverne (presenter of Desert Island Discs) said that she felt the disappointment of everyone and was devastated and scared about letting them down.
"I believed I could pull it off and make it work, but I was wrong. I stand by this decision."
She said, "I'm going to do a show not because I have to, or because people will be disappointed or because we're going lose lots of money." The show is not good enough, I think.
After breaking the news via an Instagram video, the singer was criticised for revealing the information in tears.
She explained that she could be someone on TikTok and Instagram Live every day, being like, "I'm working at it," "Ofcourse I'm working at it!" If I don't have anything to update you with, I won't. That just leads to more disappointment.
She continued, "I was a shell for a few months." I had to just wait it out and grieve it. It was hard, though.
Adele revealed to Graham Norton, a TV host, that she was working with her team on new dates. She said the Vegas gigs would be "absolutely 100%" this year.
The Weekends With Adele series, which was announced late in November, would see Adele perform two shows each weekend from January through April.
She was unable to attend her Hyde Park shows on Friday and Saturday, which were her first ticketed concert in five years.
Laverne also heard her tell Laverne that exercising had contributed to her weight loss. She also talked about her relationships with Rich Paul, a US sports agent, and Simon Konecki her ex-husband, with whom she has a child, Angelo.
Adele will be appearing on Radio 4's Desert Island Discs Sunday 3 July at 11.15 BST and BBC Sounds on 4 July.