Ok so here are a few different performances of different songs.

http://www.youtube.com/watch?v=FUYikToUnVM
http://www.youtube.com/watch?v=WSYJmoYFDZ8
http://www.youtube.com/watch?v=iEKZL3mjctQ&feature=related
http://www.youtube.com/watch?v=g--uH_2h2r8&feature=related
http://www.youtube.com/watch?v=kYE0tG6X15c
http://www.youtube.com/watch?v=1ff4BWVQDqk&feature=related
http://www.youtube.com/watch?v=1ff4BWVQDqk&feature=related
http://www.youtube.com/watch?v=U5pZjQM2IkY
http://www.youtube.com/watch?v=INkmUab8xwo&feature=related

Now tell me she can't sing!!!! that's unbelievable. vocally limited?? Well it's always been live and as far as live goes it's never p.e.r.f.e.c.t. It's funny to see that these negative comments about her vocal skills are coming from beyonce fans. Beyonce is amazing vocally, but she started her solo career by doing lots of playback. So what's worse?