Justin's mum is number one

Justin Timberlake's mum, Lynn Harless, has beaten off ex-girlfriend Britney Spears' mother in a new battle to find the best Showbiz Mom.

Harless also defeated challenges from Christina Aguilera's mother and Beyoncé's mom, Tina Knowles, in the poll in America's In Touch magazine.

Harless, who doubles up as her boy's manager, won the role of Best Showbiz Mom because she's "an essential part of his life."

The top 10 list is:

1. LYNN HARLESS (JUSTIN TIMBERLAKE)

2. SHELLY KEARNS (CHRISTINA AGUILERA)

3. TINA KNOWLES (BEYONCE)

4. LYNNE SPEARS (BRITNEY SPEARS)

5. TINA SIMPSON (JESSICA SIMPSON)

6. DENISE MUNIZ (FRANKIE MUNIZ)

7. SUSAN DUFF (HILARY DUFF)

8. LYNN BYNES (AMANDA BYNES)

9. JONNETTA PATTON (USHER)

10. DINA LOHAN (LINDSAY LOHAN)