The grieving Glee star, 26, put her heartache to one side to celebrate the impending birth of Jamie-Lynn's first child, expected to be a baby boy.
Lea has been keeping a very low profile since the tragic death of her boyfriend Cory Monteith from a lethal combination of heroin and alcohol on July 13.
Wearing a beautiful cream lace dress, Lea hid her face behind sunglasses as she departed Jamie's baby shower, held at the Thompson Beverly Hills Hotel (on August 3), but could be seen smiling while she chatted to friends.
This week Lea returned to work, joining her fellow Glee cast mates back on set as they filmed new episodes of the hit musical show.
Referring to her character, Lea told fans on Twitter: "First day of Glee today..And at my first wardrobe fitting for Rachel Berry for Season Five! I've missed her so much."
Jamie-Lynn, 32, is best known for her role as Meadow Soprano on the HBO television series The Sopranos.
She was also left heartbroken earlier this year when her on-screen dad and off-screen friend James Gandolfini died suddenly of a heart attack.
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