What a treat it is to dive back into the cozy world of Bridget Jones, who is the kind of old friend you can pick up with right where it left off, no matter how long it's been. "Bridget Jones's Baby" opens with a familiar scene for our pal: Bridget (Renee Zellweger) celebrating her birthday alone to the tune of "All By Myself," blowing out a candle on a single cupcake, guzzling white wine in her jammies.