Which carol originally written in German is titled 'O Tannenbaum'?

O Christmas Tree

In Taylor Swift’s song, who left her scarf at his sister’s house in 'All Too Well'? Who deceived Isaac by wearing goat skins pretending to be Esau? Which video game features the antagonist Albert Wesker? Which magical object shows your reflection? Who was the first foreign-born player to be drafted first overall in the NBA Draft?