Ricky Martin's children are his toughest critics.

The 'Livin' La Vida Loca' hitmaker says his eight-year-old twin sons, Valentino and Matteo, often give him advice on how he can improve his performances.

Speaking on 'The Tonight Show Starring Jimmy Fallon,' the 45-year-old singer said: ''They travel with me everywhere and they sit backstage and they look at my show every night. One day one of them went like, 'Daddy, what happened tonight? I didn't like this part. Yesterday was better, last night was better.'''

The singer's sons are ''completely different.''

He added: ''Matteo loves drums, he might come one day (to perform). Valentino is so sweet. He loves mud and I love that he loves mud. He loves 'Peppa Pig.'''

Ricky also opened up about his recent engagement to longtime boyfriend Jwan Yosef, saying: ''I'm really happy.''

Asked how he met his fiancé, he added: ''He is a conceptual artist and I'm a collector, and I saw his art on the Internet and I contacted him. Then we met and everything's been perfect.''

The Latin heartthrob is excited to kick off his Las Vegas residency at the Park Theater at Monte Carlo Resort and Casino in April, but plans to commute to his concerts as he doesn't want to uproot his family.

He explained: ''Now I live in Los Angeles so I'll be commuting, so the kids will be pretty stable, which is a good thing.''