Fearne Cotton didn't change her underwear for one week when she climbed Mount Kilimanjaro.

The 35-year-old radio and television presenter has admitted she wore the same pair of knickers when she trekked up the dormant volcano in Tanzania for charity eight years ago with Alesha Dixon, Ronan Keating, former Girls Aloud band members Cheryl and Kimberley Walsh and Denise Van Outen.

Alongside a picture of the blonde beauty with the fellow celebrity hikers, which she shared on her Instagram account, she wrote: ''8 years ago we had just climbed Kilimanjaro. Although slightly tarnished with puking behind rocks and not changing my underwear for a week (sic).''

However, the former 'Top of the Pops' host , who was in the first group to reach the summit in 2009 and helped to raise £3.3 million, has no regrets about the experience.

She continued: ''It was the best adventure ever! (sic).''

Meanwhile Fearne, who has four-year-old son Rex and 18-month-old daughter Honey with her husband Jesse Wood, believes her marriage with her musician spouse will never be ''perfect'' because she thinks every relationship has minor flaws, although she has hailed the 40-year-old guitarist as her ''soulmate''.

Speaking previously about marital life, she said: ''Married life to your dad is gorgeous.

''I have found my soul mate and a very lovely one at that... He is kind, caring, open, honest and very funny... Yes, he leaves his pants on the bathroom floor and the cupboards open after he has made a cup of tea, but hey, that's marriage.

''No set-up will ever be perfect because life is not supposed to be that way. Speak openly to your partner and always listen. Love them with every inch of your heart, but only if they shower you in the same. Find someone who makes your heart sing and illuminates all your best bits.''