jamielynnsimonvegas.jpgEd Graff

Jamie Lynn Spears' daughter Maddie was loving Las Vegas Friday night as she and her mom dined at Simon at The Palms. Jamie Lynn had the Big Eye Tuna and Maddie munched on the mac 'n cheese.

The pair also hit the pool during their time there ... baby daddy Casey Aldridge was nowhere in sight.

Jamie Lynn celebrated her 20th birthday April 4th and Maddie will turn 3 next month. Click through to see Jamie Lynn celebrating her birthday last month ...