Rihanna just learned a hard lesson ... acting like an irresponsible Lindsay Lohan can cost you a LOT of money -- in this case $47,050.
Rihanna's ex-accountants have been trying to get the singer to sit for a deposition in a lawsuit she filed against them. Rihanna claims they mismanaged her money and owed her millions, but the accountants claim Rihanna's the one who's at fault.
According to the accountants -- Berdon LLP -- Rihanna's been blowing off deposition after deposition (Lindsay-style) costing them boatloads in attorneys' fees, so Berdon asked the judge to punish the singer.
And this month, the judge agreed, fining Rihanna $47,050 for Berdon's legal bills.
On top of the fine, the judge also ordered Rihanna to sit for a deposition once and for all on August 28 ... and if she doesn't show up, he might dismiss her case entirely.
There's still hope.
It was only a matter of time -- Miley Cyrus went FULL NAKED for an artsy photo shoot ... but sorry pervs, it ain't exactly a Penthouse spread.
20-year-old Miley stripped down to her birthday suit for a Marc Jacobs t-shirt -- which is part of the designer's "Protect the Skin You're In" campaign to raise awareness for melanoma research.
Of course, the slogan is carefully placed over Miley's chest to cover her nipples ... and she uses her hand to hide her hooha. You can breathe easy, Billy Ray ...
Miley posted the image on her Twitter page -- along with the caption, "Ts are available at 9 Marc Jacobs boutiques including SanFran, LA, Chicago, New York, Boston, & Savannah GA!"
The shirts cost money ... but your imagination is free.