"So excited and happy for my sister," Britney, 31, tweeted past midnight on Monday (March 3). "Congrats @jamielynnspears - love you." Jamie Lynn shared her dazzling engagement ring with her Instagram followers and praised her hubby-to-be's selection: "He did good."
The wedding news may be somewhat bittersweet for first-time bride Jamie Lynn's famous older sister. Britney and love Jason Trawick broke off their engagement back in January; the "Criminal" singer has been wed twice before -- to pal Jason Alexander (for 55 hours!) and Kevin Federline, with whom she has two kids.