The 35-year-old singer and the 29-year-old Formula One star have been dating on and off since 2006 and although they appeared to have split for good last year, rumours emerged last week that the pair had got engaged after Lewis posted a picture of them on Instagram and referred to Nicole as ''wifey'' in the caption.
However, though Lewis has insisted they haven't got engaged, insiders say the couple's relationship is very much back on.
A source told The Sun newspaper: ''There's always speculation and they are very committed to one another but they have only been back together since Christmas.
''They want to spend time getting to know each other again without having to worry about wedding bells.''
The couple's relationship has failed in the past as they've struggled to juggle their work commitments with spending time with one another, but as Nicole has decided to step down from her position as a judge on 'The X Factor' she could have more time to visit the racer as he competes in Grand Prix across the world.
Lewis has also revealed that his relationship with his father, Anthony Hamilton, is back on track after falling out with one another following the race car driver's decision to drop him as his manager in 2010.
Speaking at the Australian Grand Prix in Melbourne yesterday (17.03.14), he said: ''There are no problems between us now, he even goes to some of my races and always supports me ... My dad is my dad and we have a normal dad-and-son relationship.''
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.
British pop heartthrobs One Direction became a worldwide sensation when they were thrust together on...
Agents K and J work for the Men In Black, an organisation specialising in hunting...