Tagdef

just now: @JMACisH0T: #Nowplaying Overboard @JustinBieber ft @jessicajarrell
just now: @jeremiah2man: #nowplaying Crawl by Chris Brown, via @Osfoora
just now: @Astromagui: #nowplaying Munchausen by Proxy ~ Uh Huh!
just now: @TheVideoDJ: Jimmy Buffett video selection - click here: http://bit.ly/dm9fuf 0#music #nowplaying #guitar 0#musicmonday #video #tickets #jimmybuffett
just now: @Mz_Bridget2Hot: #NowPlaying The Killing Jar http://myloc.me/bnUm8
just now: @_kissshot: #nowplaying ♪シアワセうさぎ - あまね＋ビートまりお #followmeJP
just now: @natsuki_carbon: #NowPlaying "SCOOP SCOPE" by 水樹奈々 on album "IMPACT EXCITER"
just now: @preezyXL: #Nowplaying Soulja Boy - Black on Black on Black
just now: @Sarrrraah: #nowplaying Anatomy of the Tongue in Cheek, Relient K. Good stuff!
just now: @jojoMIDNYTE: #nowplaying - Make It Hot - LL Cool J *waves to 1995* That "Mr. Smith" was the first CD I ever purchased
just now: @rudeee_boy: #nowPLAYING JANET JACKSON - DOESN'T REALLY MATTER
just now: @Carlitos_vip: #nowplaying como curar zion y lennox Sta dura la song!!
just now: @tvgd: #NowPlaying: #VidaFodona 226: http://bit.ly/cbmEXd
just now: @miracametodance: #nowplaying Wake Me Up When September Ends - Green Day.
just now: @DrizzyJay171: #Nowplaying Baby By Me 50 Cent

What does the tag #nowplaying mean on Twitter?