Calendar for Jan. 16

SATURDAY

Omarion

R&B singer and songwriter Omarion will perform at Sutra 1870 Harbor Blvd., Costa Mesa. Tickets are $20 to $30 and the 21-and-older show starts at 9 p.m. For more information, call (949) 722-7103 or visit sutraoc.com.

‘Getting Unstuck’

A half-day seminar will discuss how to overcome challenges in finance, health, relationships and careers. The event is from 9 a.m. to 2 p.m. at Crash Labs, 234 E. 17th St., Ste. 117, Costa Mesa. Tickets are $92.22 to $183.44. For more information, visit ceciliagorman.com.

Arthur Benjamin: ‘Mathemagician’

Arthur Benjamin, a professor of mathematics at Harvey Mudd College, will demonstrate how to mentally add and multiply numbers faster than a calculator or how to figure out the day of the week of any date in history. The event is at 1 p.m. at Irvine Barclay Theatre, 4242 Campus Drive. Tickets are $15. For more information, call (949) 854-4646 or visit thebarclay.org.

Greg Topper

Orange County rock ‘n’ roll veteran Greg Topper will perform at 5 p.m. at the Pierce Street Annex, 330 E. 17th St., Costa Mesa. The free show is 21 and older. For more information, call (949) 646-8500.