What is the name of the song that contains the lyrics 'seldom do i think of how u mean the world to me?'?

i really determined to find an answer. This is because i was watching chanelle and danny's dance on SYTYCD'S easter special on the officialy website the song contained the lyrics 'seldom do i think of how you mean the world to me' but when the video on the website cancelled i turned to youtube. However on youtube the song sounded totally different to what i heard on the website. It was a lot more less lyrical and i didnt like it. if u can answer please help.