Matt Rutler and Christina Aguilera
03/08/2011 AT 05:00 PM EST
Following her Tuesday arrest
for public intoxication, Christina Aguilera
and beau Matt Rutler
slipped out to L.A.'s Osteria Mozza
for a quiet dinner around 11 p.m. Friday. After eating, the couple realized photographers were outside waiting for them, so the singer called her bodyguard to come drive her car home, while she and Rutler, who was also arrested Tuesday on suspicion of DUI, discreetly took a limo.