Britney Spears was joined by her sons, Sean Preston Federline and Jayden James Federline, for a stop at Starbucks on Saturday in LA. Britney also brought her pup, Hannah, along for the fun. Absent from the family outing was her fiancé Jason Trawick, who celebrated his 41st birthday Saturday as well. Brit was sure to wish Jason a happy birthday on Twitter, though. She shared a picture of a young Jason blowing out candles on his cake many birthdays ago, saying, "There are definitely going to be a few more candles on your cake tonight. Happy birthday baby, love you so much!" Brit was able to celebrate with her husband-to-be during a break from wrapping up her X Factor-judging duties — the show winds down with the final cut this week.