The 26-year-old singer and his bandmates - Oritse Williams, Aston Merrygold and J.B. Gill - are getting ready for their final ever concerts in December and the release of their last album 'Goodbye: The Greatest Hits' and as they start to look back on their career one night sticks in Marvin's mind.
The 'She Makes Me Wanna' hitmaker insists nothing will top the night they went home with the gongs for British Breakthrough and British Single - for 'Beat Again' - at the 2010 BRIT Awards.
When asked to name his favourite moment in JLS, Marvin told BANG Showbiz: ''That we're Brit Award winners I think. We were the first 'X Factor' act to win at the BRITs ... I remember when I was 10 years old I got interviewed by my local newspaper and I said when I was older I wanted win at the BRITs and we did it.''
Despite the decision to go their separate ways, the boys - who shot to fame on 'The X Factor' in 2008 but lost in the final to Alexandra Burke, coming third behind Eoghan Quigg - are certain they will remain close friends forever.
Marvin said: ''Once we split of course we're all going to busy individually so we aren't going to be all together as much as we want but we will definitely still see each other lots. It's going to be like we haven't split up, you know, socially because we'll still be together.''
Oritse agreed with his friend, adding: ''We're still meeting up and we're still going out and that's going to continue. Our families are all one big family as. Family is family and that doesn't change.''
JLS will be releasing a live DVD of their concert at The O2 in London and 'Goodbye - The Greatest Hits Tour DVD' is available to pre-order now.
The 1969 session, including the only known recording of 'Sunshine Woman' by the band, will be included on a re-issue of 'The Complete BBC Sessions'...
The 55 year old actor joined Chris Martin and co. on stage in New Jersey to perform 'Earth Angel' and 'Johnny B. Goode'.
Bjork Digital comes to London's Somerset House in September, along with a single live show at the Royal Albert Hall.
Kim Kardashian released an audio excerpt from a phone call between Kanye and Taylor Swift over the lyrics of 'Famous' - but if it was recorded...
There's very much a strength of conviction in remaining what you were, but arguably more so in becoming what you want to be.
The BBC drama starring Aidan Turner returns to BBC One on September 4th.
Guns N' Roses were detained at the Canadian border last week for gun possession but they're adamant the weapon didn't belong to them.