Gwen Stefani's birthday is October 3rd! (Photo by Bryan Bedder/Getty Images for L.A.M.B.)
Bruno Mars's birthday is October 8th! (Photo by Kevin C. Cox/Getty Images)
Usher's birthday is October 14th! (Photo by Christopher Polk/Getty Images for iHeartMedia)
Eminem's birthday is October 17th! (Photo by Theo Wargo/Getty Images)
Zac Efron's birthday is October 18th! (Photo by Theo Wargo/NBC/Getty Images for "The Tonight Show Starring Jimmy Fallon")
Kim Kardashian's birthday is October 21st! (Photo by Pascal Le Segretain/Getty Images)
Ryan Reynolds's birthday is October 23rd! (Photo by Leonard Adam/Getty Images)
Drake's birthday is October 24th! (Photo by Kevin Winter/Getty Images)
The CW's Eliza Taylor's birthday is October 24th! (Photo by Smallz+Raskind/Warner Bros. Entertainment Inc. via Getty Images)
Ciara's birthday is October 25th! (Photo by Jason Merritt/Getty Images)
Katy Perry's birthday is October 25th! (Photo by Frazer Harrison/Getty Images)
Julia Roberts's birthday is October 28th! (Photo by Angela Weiss/Getty Images for TheWrap)
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