There are six Dora songs:
‘Mary Had a Little Lamb’ - Starting Steps (this song needs to be unlocked by earning 12 stars in this category)
‘The Travel Song’ - Starting Steps
‘Here Comes Santa Claus’ - Smooth Moves
‘La Bamba’ - Fancy Footwork
‘Twinkle, Twinkle, Little Star’ - Workout Song
‘Sing-Along Party Mix’ - Workout Song
Upon dancing through these six songs, the achievement will unlock.