Editor's Note: First Notes is a weekly update of recent happenings in the world of music.

* His "Gangnam Style" video has received more than 2 billion hits, so it's no surprise that Psy's latest video, "Hangover" featuring Snoop Dogg, has received more than 5 million in less than a day. Of course, the duo's appearance and singing karaoke together was more entertaining.

*There's a lot of chatter online about a possible Kinks reunion and tour.

* Sir Mix-A-Lot performed "Baby's Got Back" with the Seattle Symphony.

* Death Grips, who will perform at PNC Music Pavilion with Soundgarden and Nine Inch Nails in August, dropped a surprise free album featuring Bjork.