So this is the story :
“It appears that Beyonce](Beyoncé Knowles News - Us Weekly) whipped her hair back and forth a little too vigorously during a Monday, July 22 concert in Montreal – getting her famous hair caught in a huge fan while singing “Halo.” But, Beyonce being Beyonce, the superstar continued belting out the powerful ballad without a hitch for an 18,000-strong audience as guards tried to free her tresses from the wind-blowing device.”
**BUT **
I think the reason was very sweet :
"“There was a girl in the front who was holding up a sign with a bucket list on it of all the things she wanted to do with her life. It was things like ‘graduate from college’ and all the boxes were checked except the last one, which was ‘Sing With Beyonce!’” the source tells Us.“Beyonce was so moved she went down into the pit to sing ‘Halo’ with the girl to give her her final wish,” says the insider. “She wasn’t even thinking of the fan – she was focused on the girl she was trying to do something nice for and it was unprompted. It really came from a good place.”
Source :
Beyonce’s Hair Caught in Fan at Concert: Star Was Doing Good Deed - UsMagazine.com
(I have no idea what it means)