...BUT MISSUS NICOLE WARNS SINGER OVER TELL-ALL BOOK

drinking antics on board the plane.

They were apparently on the way to Japan’s Fuji Rocks festival when they joined the Mile High Club and the X-rated antics will be apparently detailed in Lily’s explosive new book.

Hitmaker Lily, who hasn’t released an album since 2014, has reportedly penned down the raunchy details in My Thoughts Exactly which is set to be released later this year.

However, when news of Lily’s bonk with Liam was aired over the weekend, Liam’s ex-wife Nicole, 43, was less than impressed and took to Twitter to warn the Smile singer, posting: “One day our paths will cross @lilyallen!” in the wake of reports she’s going to reveal all.

Liam married All Saints songstress Nicole in February 2008, just 17 months before the alleged fling with Lily.

A source yesterday said: “Nicole is gobsmacked about the whole thing. At the time, Lily even called her up to insist nothing went on between her and Liam.

“But she’s now questioning exactly what did go on and decided to tweet her in order to ask what the truth is on a very public forum.”

However, many of Nicole’s followers were unimpressed with her tweet, given her involvement in Paddy McGuinness and his wife Christine’s near-split.

One wrote: “Now you know how @PaddyMcGuinness wife felt especially with young children! Not nice is it…”

Nicole was blamed for breaking Christine’s heart after her husband Paddy was recently pictured on a secret night out with her – although there’s no suggestion of infidelity.

Meanwhile, Lily has seemingly denied she is set to talk about any sort of Gallagher liaison in her new memoir.

She tweeted on Sunday night: “An unsubstantiated tabloid speculation does not an advertisement make.”