Katy Perry and Justin Trudeau thought they were going to keep their reported romance under wraps, but some arm ink gave them away.

The 40-year-old pop star and the 53-year-old former Canadian prime minister were spotted this week on a yacht adventure off the coast of Santa Barbara, California. The Mail on Sunday published snapshots of the duo in the middle of a steamy make-out session. They were on board Perry’s yacht, the Caravelle — she wore a sleek, black one-piece, and Trudeau was shirtless with a pair of jeans on.

An eyewitness from a whale-watching boat caught the duo in an embrace, realizing who they were looking at once she saw Trudeau’s tattoo.

“She pulled up her boat next to a small public whale-watching boat, then they started making out. I didn’t realize who she was with unt

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