Grease Dance

This trophy is a bit tricky but very doable if you are comfortable with any song; you need to perform only Perfect moves 5 times in a row. No Good, Ok or Poor notes are allowed in your streak, only Perfects.
 

You can try the song Look At Me, I’m Sandra Dee (Easy), which is the shortest song in the game and the moves are easy enough.

Another recommendation is to select Born To Hand Jive (Hard). The very first 20-25 moves are very doable.

The trophy will pop as soon as you perform your 5th Perfect move in a row.