Miley Cyrus Rocks A Swimsuit On An October Day In L.A.

It may be October, but fall isn't stopping Miley Cyrus from slipping into a sexy swimsuit.

The 20-year-old pop star posted a photo of herself lounging by the pool in a red one-piece yesterday (Oct. 19), writing:

According to Weather.com, Los Angeles enjoyed high 80's on Saturday, so obviously bathing suits were a must over Halloween costumes ...

Cyrus, who is reportedly dating photographer Theo Wenner after splitting from fiance Liam Hemsworth, has been lying low these days following her action-packed promotional tour for her new album "BANGERZ."

Rest up, Miley!