01/09/2013 at 09:00 AM EST
She's marching on!
Following the end of a whirlwind romance
with One Direction heartthrob Harry Styles that took her from New York City
to northern England
, the ski slopes of Utah
and the British Virgin Isles
, Taylor Swift
stepped out alone in Los Angeles on Tuesday.
The Grammy-winning singer, 23 – who just split with Styles, 18, and left the Caribbean solo – was photographed outside a friend's home in the Brentwood area of L.A.
The couple first showed off their affection
during taping of The X Factor
in November and even shared a kiss at midnight
on New Year's Eve.
Despite appearances, a Swift source told PEOPLE of the romance, "No one is taking it seriously."
Maybe that's why she's still smiling.