Something like http://www.amazon.com/Tascam-DR-03-Portable-Handheld-Recorder/dp/B0044FNCY8/ref=pd_cp_MI_pw_3
There are too many like that. Then in post production you merge the audio you want.
Bob
Hi! I have a HP V5061u\V5061Au digital camcorder. I have taken many videos of my bf performing at different venues and the sound is always sooo bad! I get that the noise from the crowd and distortion from the speakers disrupt the sound but phone videos come out clearer. I was hoping for someone to suggest what i should do to get a better sound to the music! Thanks

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic