What's the meaning of "sing into a hairbrush"?上下文是“Ever since The Beatles shook their floopy,moppy hair on stage in 1960,fans have been singing into hairbrushes and strumming air guitars.”

What's the meaning of "sing into a hairbrush"?上下文是“Ever since The Beatles shook their floopy,moppy hair on stage in 1960,fans have been singing into hairbrushes and strumming air guitars.”
What's the meaning of "sing into a hairbrush"?
上下文是“Ever since The Beatles shook their floopy,moppy hair on stage in 1960,fans have been singing into hairbrushes and strumming air guitars.”

What's the meaning of "sing into a hairbrush"?上下文是“Ever since The Beatles shook their floopy,moppy hair on stage in 1960,fans have been singing into hairbrushes and strumming air guitars.”
那应该是楼上的观点了 拿着梳子当麦唱 形容人们的疯狂

“对着梳子唱歌”是什么意思？
（这估计小时候都做过吧，拿把梳子当麦克风唱歌）