Complex sentence: Menzel enlisted Glen Ballard, best known for Alanis Morissette's 16-times-platinum Jagged Little Pill and who has worked with Shakira, Christina Aguilera, Annie Lennox and Celine Dion, produced and co-wrote all but one of the songs on I Stand with Menzel.
Split into simpler sentences: Menzel enlisted Glen Ballard, best known for Alanis Morissette's 16-times-platinum Jagged Little Pill and who has worked with Shakira, Christina Aguilera, Annie Lennox and Celine Dion. Ballard produced and co-wrote all but one of the songs on "I Stand" with Menzel.