3 sentences

1. 这位歌手由三位专业和声人员伴唱。

   zhè wèi gē​shǒu yóu sān wèi zhuān​yè hé​shēng rén​yuán bàn​chàng.

   The singer is backed by three professional vocalists.

   Source: Dong Chinese Dictionary

2. 我需要找些非常厉害的歌手给她伴唱。

   wǒ xū​yào zhǎo xiē fēi​cháng lì​hai de gē​shǒu gěi tā bàn​chàng.

   I need some amazing vocalists behind her.

   Source: OpenSubtitles

3. 她正在舞台上为那位著名的歌手伴唱。

   tā zhèng​zài wǔ​tái shàng wèi nà wèi zhù​míng de gē​shǒu bàn​chàng.

   She is currently on stage providing backup vocals for that famous singer.

   Source: Dong Chinese Dictionary