The 'Glee' actress is delighted with rumours that the 48-year-old Scottish singing sensation - who shot to fame after competing on UK TV programme 'Britain's Got Talent' in 2009 - is set for a cameo in the show because her rise to success is similar to that of the stars of the musical drama.
Asked about the speculation, Lea said: "Oh my God, I have no idea! It would be so incredible to sing with her.
"She had a hidden talent which was then discovered, which is what happened to so many of us from 'Glee'. Look at Amber Riley and Chris Colfer - they're incredible and thanks to 'Glee' the world gets to see them.
"I think Susan Boyle is perfect. She's a shoo-in."
She added in an interview with Britain's LOOK magazine: "We all loved doing the Madonna show - it was one of my favourite episodes. We're hoping to do a part two. Maybe Madonna could be the sex education teacher.
"Justin Timberlake would be great. He is perfect."