Lindsay Lohan wasted no time in heading over to Samantha Ronson's house after getting back to LA yesterday. The girls flew home together, and LL twittered her happiness at having her "favorite favorite" travel buddy with her. She also cryptically said she has "great news to share," which, coupled with the diamond ring she's been sporting lately, has people speculating they're engaged. Apparently Lindsay already considers herself back together with Samantha, although assuming a wedding is in their future is a bit of a leap, especially taking into account how much LL likes to play around with the press.