so apparently my comparison is suppose to be written in formal and not in first person. so my first sentence is not right.how can i rephrase "Miley Cyrus song "The climb" is not only one of my favourite songs, but so it Katy Perry's song"firework? or just another sentence. will this is the pretty general part of my intro so its nothing speific. just comparing these two songs.

To rephrase your sentence in a more formal tone and remove the first-person reference, you can say:

"The song 'The Climb' by Miley Cyrus is not only popular among music enthusiasts but also 'Firework' by Katy Perry shares the same level of admiration."

Alternatively, you can use another sentence to convey a similar meaning:
"Both 'The Climb' by Miley Cyrus and 'Firework' by Katy Perry are beloved songs that have captivated listeners with their inspirational and uplifting messages."