呢首係咩英文歌??

有一句係咁:
I don't care what they say;
I don't care what they do.....(之後唔係好清楚...)
我 download ge 時候 ,就話係 Britney Spears ge "Let me be" 但我之後係網上聽番 Let me be 呢首歌 ....唔同喎!! 咁究竟係 我 download 個時已經錯左 , or 係網錯呢?? THX
如果有人知 ,可唔可以講首歌 ge 真正 名 同埋係邊個唱??唔該!!