The singer confirmed her claim she had made to the media  where  she said she would not leave the band.

我跟曹老师的分析不同。

1. she had made to the media ，是her claim 的定语从句。关系代词被省略，意为：她向媒体发表的（声明）

2. where she said she would not leave the band， 是the media 的定语从句。插入she said 后作为双重定语从句，修饰the media，用where 指代把the media， 看作广义的地点状语。

【翻译】这位歌手确认了她向媒体发布的声明，在媒体上她说她不会离开这只乐队。

The singer （主语）//confirmed（谓语动词）// her claim（宾语）// （定语从句）she had made to the media //（修饰名词“her claim”的定语从句） where she said she would not leave the band.

参考译文：这位歌手证实了她向媒体发表的声明，她说她不会离开乐队。