Complex sentence: Blogger Perez Hilton declared on his own Twitter account that Aguilera is working with the band Le Tigre, an American dance-punk band known for its socio-political lyrics, dealing with issues of feminism and the LGBT community.
Split into simpler sentences: Blogger Perez Hilton declared on his own Twitter account that Aguilera is working with the band Le Tigre. It's an American dance-punk band, which is known for its socio-political lyrics, dealing with issues of feminism and the LGBT community.