Olivia Newton-John has said she supports gay marriage because “love is love.”

In January, Newton-John was among the celebrities to endorse an effort to legalize such unions in her native Australia. Also signing on to the endorsement were actor Hugh Jackman, Wallaby's captain David Pocock, film critics David Stratton and Margaret Pomeranz and costume designer Lizzy Gardiner.

In an interview before giving a performance at Chicago's recent Market Days street fair, Newton-John explained her reasons for supporting marriage for gay and lesbian couples.

“To me love is love. It shouldn't matter. I have so many close friends and family who are gay I don't even think about it,” she told ChicagoPride.com.

“I just want everyone to have the chance to love who they want to and it just shouldn't matter. Some of the closest people in my life are gay and I have to say, have had longer committed relationships than many of my straight friends – including my beautiful sister Sarah and her partner.”

(Related: David Pocock says he won't marry until gay marriage is legal in Australia.)