Once she came to Shanghai to hold her c_____这里的hold好像是召集的意思吧.

Once she came to Shanghai to hold her c_____这里的hold好像是召集的意思吧.
Once she came to Shanghai to hold her c_____
这里的hold好像是召集的意思吧.

Once she came to Shanghai to hold her c_____这里的hold好像是召集的意思吧.
Once she came to Shanghai to hold her （call）.
翻译：她一来到上海就接通她的电话.

conference

不是召集是召开 ，主持的意思
hold the conference 召开会议

当然是concert（音乐会，演唱会）
一看到粉丝见面会就知道是歌星之类，歌星到大城市当然要开演唱会。