The 290m long MSC Magnifica isn't just a luxurious, US$550 (NZ$637.90) million cruise ship.
It's the world's first 4500-passenger musical instrument, and it rocked a slow, loooouuud rendition of The White Stripes' "Seven Nation Army" at this weekend's 825th Hamburg Port Anniversary in Germany.
Talk about rocking the boat.
They have been throwing this party since the year 1189 - they clearly have plenty of practice at gettin' down. And with the Magnifica on tunes, you know it was bumpin'.