Mama Spears at Hospital -- Britney's O.K.

TMZ just caught up with Lynne Spears -- with Brit's bro Bryan -- outside of UCLA Medical center, where Britney is now on a three-day psychiatric hold.

Lynne said very little, except to confirm that her daughter was O.K. TMZ also caught Brit's father, a solemn looking Jamie, making his exit, alone.