Black Eyed Peas gave Taboo hope as he battled testicular cancer.

Black Eyed Peas

Black Eyed Peas

The 'Where Is The Love?' star - who marked four years since he overcame the disease on Monday (10.09.18) - admitted it was his family and bandmates who inspired him to stay strong during his fight with the illness.

Appearing on ITV's 'This Morning', he said: "It was brutal - it was like nightmare, torture and war. But the thing that kept be fighting on was my wife and my kids, and knowing that I could be on that big stage again with my best friends."

The 43-year-old rapper appeared on the British daytime show with will.i.am, and he admitted the longtime friends became even closer together.

He explained: "The experience of me battling cancer brought us closer as friends before anything. You see on stage, Black Eyed Peas - it's a friendship, a brotherhood that started since we were teenagers."

'The Voice' judge will.i.am also revealed his excitement at getting back together with the group - who will return to the UK on tour next month - after spending too much time alone on the road.

He said: "Dude, I don't like being up here alone, I miss my best friends. I didn't sign up to be a solo act, I signed up to be in a group. We're best friends."

The reunion for the 'I Gotta Feeling' rappers - who are celebrating their 20th anniversary in 2018 - was kick-started back in 2016 when will.i.am reformed with Apl.de.ap and Taboo for a concert at the Royal Albert Hall in London in May 2016, the first time the trio had performed together in five years.