What is the fine-grained topic of the following text: As well as a bleach-hair and browed Gaga, there are cameos from Lucky Blue Smith, Lexi Bolling, Aymeline Valade, Kayla Scott, Xaio Wen Ju and Valery Kaufman, all dancing like they're in a Soul Train line-up. Only return the topic.
Cameos in a Soul Train line-up style dance