Ra ra Rasputin/Lover of the Russian queen/They put some poison into his wine/Ra ra Rasputin/Russia's greatest love machine/He drank it all and said "I feel fine"
Ra ra Rasputin/Lover of the Russian Queen/They didn't quit, they wanted his head/Ra ra Rasputin/Russia's greatest love machine/And so they shot him till he was dead
But there must be more to the song, because Rasputin wasn't quite dead even after he was shot! Read what really happened to Rasputin, and to the Romanovs at Atlas Obscura. Link