Beyoncé has unveiled new track ‘Bow Down/I Been On’. The singer released the song this evening (March 17) on her official Tumblr page. The second half of the track includes the instrumental featured in the singer’s O2 Priority campaign for tickets to her upcoming world tour. It is rumored to have been produced by Hit-Boy. It is not known whether ‘Bow Down/I Been On’ will be the first single to be taken from the star’s upcoming fifth studio album. No release details for the record have been announced. The new LP will be Beyoncé’s first release since 2011′s 4 and follows her headline half-time show at this year’s Super Bowl in February. The singer’s representatives refused to comment on a leaked tracklist for her as-yet-untitled album, which included collaborations with Rihanna, Justin Timberlake and Lady GaGa. ‘The Mrs Carter Show’ world tour kicks off in Belgrade, Serbia on April 15 before reaching the UK on April 26. The singer will play 13 UK and Ireland dates, including six shows at London’s O2 Arena in May.