Being a mom happens in all shapes and sizes, especially when it comes to celebrities. Whether they have biological or adopted children, are single or “consciously uncoupled,” or act as maternal role models, these public figures take motherhood, make it their own and teach us a few lessons while they’re at it.

In recent years, women like Michelle Obama, Angelina Jolie, Oprah Winfrey, January Jones, Jessica Alba, Sheryl Sandberg and Sandra Bullock have inspired the world with their words, wisdom and unique parenting techniques. In honor of Mother’s Day, LivingHealthy is paying tribute to 20 inspirational moms and other motherly figures by highlighting some of their most poignant (and sometimes slightly controversial) quotes.