Briallen was cheerfully singing to Hermione as they, plus a couple of their other friends, used a shortcut to head up to the library, "There she was just a-walkin" down the street, singin" Do wah diddy diddy dum diddy do'Snappin" her fingers and shufflin" her feet, singin" Do wah diddy diddy dum diddy do'She looked good (Looked good)She looked fine (Looked fine)She looked good, she looked fineAnd I nearly lost my mind"