Turns out Bey was in town for her boy Jay Z's duet with that other guy at Fenway tonight. Stanley Staco reports she got as snagged by post-concert traffic as everybody else in greater Kenmore:
FENWAY: Mult Boston Police CycleDiv units Setting up to move Jay Z + Beyonce outa Fenway Area, Lansdowne St now Gridlocked - Avoid Area.
FENWAY: Jay Z + Beyonce (code name PACKAGE) now being Rolled Out Lansdowne St under Boston Police Escort - Active Area
FENWAY *update* Package in Limo Stuck on Ipswich St, due to disabled motor vehicle ahead, Crowd is forming, BPD units working All Hands.