Lady Gaga returns to the 'SNL' stage tonight as both host and musical guest! No surprise there, since Gaga's success is largely thanks to her ability to perform. She can sing, she can dance, and she really knows how to work a stage ... but can she, you know, act? We saw a little of what she can do last time around, but this week 'SNL' puts her talents to the test and gives her a show all her own. Read on for our review of tonight's all-new episode of 'SNL'!