photo by: Lauren Fox

C.B. Riling is surprised on her 91st birthday with a drive-by celebration from friends and family Tuesday night.

photo by: Claire Riling

Cars line up in advance of the drive-by birthday celebration for 91-year-old C.B. Riling on Tuesday night.

photo by: Lauren Fox

Susie Brooks holds up a birthday sign for her mom, C.B. Riling, who turned 91 on Tuesday.

photo by: Lauren Fox

Turner Brooks taped a birthday sign out of his car window for his grandmother, C.B. Riling, who turned 91 on Tuesday.

photo by: Lauren Fox

Susie Brooks, left, and Tim Riling, right, show off their signs for their mom’s birthday drive-by celebration. C.B. Riling, center, turned 91 on Tuesday.

photo by: Lauren Fox

C.B. Riling waves at friends and family members who drove by her home Tuesday night to celebrate her 91st birthday. At left, health care worker Sharon Matthews watches the proceedings.

photo by: Lauren Fox

A Lawrence police officer escorts a drive-by celebration in front of the home of longtime Lawrencian C.B. Riling, who turned 91 on Tuesday.

photo by: Claire Riling

Natalie Riling and her grandma, Ashley Riling, participate in the drive-by birthday parade for 91-year-old C.B. Riling.