Miley Cyrus Goes Bra-less In Public...Again

Once again, Miley Cyrus decides not to wear a bra in public. This time, the 19-year-old was having a shopping day with her mom, Tish, and flashed her boob while shopping. Miley tweeted earlier that day, "I [love] Mommy and me days. She makes me so happy." 
Over the past year, Miley's been seen without a bra more than she's been seen WITH one, but this dates back to 2009, when she also flashed her boob while shopping.
How hard is it to put on your underwear!?