What is the fine-grained topic of the following text: This year’s panel of musical guests will include Polaris Music Prize-winning Columbian Canadian singer-songwriter Lido Pimienta, 20th century American soul and R&B cornerstone Jerry Williams Jr. (aka Swamp Dogg), and LCD Soundsystem synth player and vocalist Gavin Rayna Rossum. Only return the topic.
This year's panel of musical guests