I loved the Simpsons as a kid sadly by about season 20 I found it hard to watch every week because of grown up commitments. So I'd heard this was the worst episode ever and actually it was ok not great but nowhere near as bad as people say. I definitely laughed a few times though because of the Simpsons not Gaga. I can understand why people didn't like her in this episode I get she's meant to be positive and nice but it's laid on way too thick. Plus her voice performance was just kinda average. The main thing I didn't like was horrible people were to Lisa for seemingly no reason.
Review of Lisa Goes Gaga
