Katy Perry has broken her silence on her new romance with Justin Trudeau after receiving a marriage proposal from a fan live on stage during concert in London.

Katy Perry and Justin Trudeau just made their rumored romance officially undeniable as the pair were spotted getting very handsy aboard the singer's yacht ... and sparks were flying on the high seas.

The US president tells reporters the two countries have "great love for each other", while Carney calls Trump "transformative".