Hilary Duff sizzles in bodysuit as she kicks off her comeback tour in London amid 'toxic mom group' drama

Hilary Duff tried to put Ashley Tisdale's 'toxic mom group' drama behind her as she kicked off her sold-out Small Rooms, Big Nerves comeback tour in London on Monday.

The 38-year-old former Disney Channel star sizzled onstage O2 Shepherd's Bush Empire wearing a caped nude bodysuit, adorned with two oversized blue roses, and white go-go boots selected by stylist Caroline DeJean.

It was in this very costume that Duff concluded her 17-track setlist by performing What Dreams Are Made of, the 2003 theme song from The Lizzie McGuire Movie, for the first time ever.

'I think people are actually going to be surprised how many old songs I'm doing, and it's going to really excite them,' the blonde Texan - who boasts 46.2 million social media followers - teased in a TikTok posted Monday.

'When I was planning, I was like, "People don't have the record yet." I don't know, I feel so bored if I got to a show and I don't know the songs and people don't play what the f***ing people want.'

Duff also showcased her petite 5ft2in figure wearing a blue-denim corset and matching baggy trousers to make her triumphant return to the stage following an 18-year hiatus.

'I feel ready for tour. We've done a lot of rehearsing. I've had plenty of time to feel prepped. I wouldn't say I know it inside and out, but I know what I'm doing,' the homeschooled millennial noted.

'All of the things that I've worked on and practiced will start to filter in naturally I think, but I have some fear right now for sure. Not fear, that's too much - nerves, excitement, f***ing I'm pumped. This is what I want and it's here.'

Duff 'barely slept last night' from nerves and caring for two of her children, who caught the flu sometime before the family touched down at Heathrow Airport last Friday.

'It's like all these things in my life happening, but those things are actually maybe like helping because they're really normal and I can grasp on to them,' the mother-of-four explained.

'And this other part is not so normal.'

Also dutifully supporting Duff on her big night was her second husband Matthew Koma, who proudly Instastoried lots of footage of her from the sound booth.

'That's how it's done wifey!' the 38-year-old producer declared.

Koma (born Bair) was the primary producer on his Wifey's first album in a decade, sixth studio album Luck... or Something, which doesn't drop until February 20.

The Beverly Hills couple share three daughters - Banks, 7; Mae, 4; and Townes, 20 months - and she welcomed her 13-year-old son Luca during her six-year marriage to Mike Comrie, which ended in 2016.

Duff was still married to the 45-year-old retired NHL player when she first met Koma - who was dating Carly Rae Jepsen - while they collaborated on her 2015 album, Breathe In. Breathe Out.

The now inseparable pair might have split for six months in 2017, but they happily celebrated their sixth wedding anniversary on December 21.

Duff is next scheduled to bring her 10-date Small Rooms, Big Nerves tour to Toronto music venue History this Saturday.

The pickleball enthusiast - who gets 2.6 million monthly listeners on Spotify - will conclude the final six dates of her fifth concert tour at Voltaire inside The Venetian Las Vegas.

Meanwhile, Duff has yet to publicly address Ashley Tisdale penning a scathing essay in The Cut about feeling insecure and alienated by unnamed mothers.

The 40-year-old High School Musical alum unfollowed Duff and Mandy Moore on Instagram before deactivating her entire account amid the scandal, which had Koma blasting Tisdale as 'self obsessed' and 'tone deaf.'