It's her.

She sings. Simple and Hebe version instead of Carpenters.

Another version

Another version of That should be me from Justin Bieber.
i find it from Top Favorite from Youtube.
Frankly, i think this version is better than Bieber's.
When listening through Bieber's album, I don't really notice this song.
And I like it now.
In the mid of the song, he included Wedding Dress-Tae Yang(one of my favourite last year) to make the combination of both songs.
Share it to you now.