The Canadian singer, who is working on a new album, was out of the recording studio for six years until her return in 2011.
Lulu has spoken about ageism and sexism in the music industry.
The 'Shout' singer criticised the business that she believes forces female singers into thinking they have to 'strip off' to be successful.
She added: "The music industry is not an easy business, never has been, and the bosses aren't rushing to sign you if you're over a certain age because it's all about young people.
"Do you know what I really dislike? Female singers thinking they have to strip off when they've got talent," she continued. Lulu went on to talk about Sinead O'Connor, who previously wrote an open letter to Miley Cyrus, warning her that the music business "will prostitute [her] for all [she is] worth".
"I'm with Sinead [O'Connor] on this. I might not go about it in the way she has, but I admire her bravery for writing to these young women and expressing her concern."
Listen to Lulu's classic song 'Shout' below: