Miley Cyrus stopped by Barneys in Beverly Hills solo this afternoon. She looked to be sporting a sparkly new accessory, her 3.5-carat Neil Lane diamond engagement ring, during the shopping trip. Miley got engaged to Liam Hemsworth last week after three years of dating. The couple shared the exciting news today, and Miley has since tweeted her thanks to fans for their well-wishes. Miley's dad, Billy Ray, also shared his excitement on Twitter, writing, "All I ever hoped for as a Daddy was to see my kids reach their dreams. To find happiness...peace of mind ...and someday know... true love." The celebrations may be on hold for now though, since Liam is currently in New Orleans filming Empire State.