Remember this is Britney (Beverly Hills shopping) Spears’ sister.

Now, be hate-n’. Actually, I did Tar-get for my Bday just a few weeks back. And I have to give mad props out to the people who made me my Target pretzel for my birthday. (It was either a Target pretzel, or  a night of fine dining at Villa nightclub.)

Jamie Lynn celebrated her 17th bday with fiancé Casey Aldridge by hitting shopping at Wal-Mart and fine dinning at Ruby Tuesday.

And we have the details for you.

“They both seemed really happy, both in really good moods,” a source tells PEOPLE.

“It was just the two of them. They were like a little adult couple, very low-key.”