Ashley Tisdale: Turns 25 on July 2

Ashley Tisdale: Turns 25 on July 2

Blake Lively: The Gossip Girl turns 23 on August 25

Blake Lively: The Gossip Girl turns 23 on August 25

Blake Lively: The Gossip Girl turns 23 on August 25

Blake Lively: The Gossip Girl turns 23 on August 25

Blake Lively: The Gossip Girl turns 23 on August 25

Anna Kournikova: The Russian tennis hottie turned 29 on June 7

Anna Kournikova: The Russian tennis hottie turned 29 on June 7

Anna Kournikova: The Russian tennis hottie turned 29 on June 7

Anna Kournikova: The Russian tennis hottie turned 29 on June 7

Anna Kournikova: The Russian tennis hottie turned 29 on June 7

Ashley Tisdale: Turns 25 on July 2

Ashley Tisdale: Turns 25 on July 2

Cameron Diaz: The blonde beach bunny turns 38 on August 30

Cameron Diaz: The blonde beach bunny turns 38 on August 30

Cameron Diaz: The blonde beach bunny turns 38 on August 30

Cameron Diaz: The blonde beach bunny turns 38 on August 30

Cameron Diaz: The blonde beach bunny turns 38 on August 30

Elizabeth Hurley: The English rose turned 45 on June 10

Elizabeth Hurley: The English rose turned 45 on June 10

Elizabeth Hurley: The English rose turned 45 on June 10

Elizabeth Hurley: The English rose turned 45 on June 10

Elizabeth Hurley: The English rose turned 45 on June 10

Courteney Cox: Celebrated her 46th birthday in June with pals including Jennifer Aniston

Courteney Cox: Celebrated her 46th birthday in June with pals including Jennifer Aniston

Courteney Cox: Celebrated her 46th birthday in June with pals including Jennifer Aniston

Courteney Cox: Celebrated her 46th birthday in June with pals including Jennifer Aniston

Courteney Cox: Celebrated her 46th birthday in June with pals including Jennifer Aniston

Jessica Simpson: Hits the 30 milestone on July 10

Jessica Simpson: Hits the 30 milestone on July 10

Jessica Simpson: Hits the 30 milestone on July 10

Jessica Simpson: Hits the 30 milestone on July 10

Lindsay Lohan: She will turn 24 on July 2

Lindsay Lohan: She will turn 24 on July 2

Lindsay Lohan: She will turn 24 on July 2

Lindsay Lohan: She will turn 24 on July 2

Lindsay Lohan: She will turn 24 on July 2

LeAnn Rimes: The country singer and actress marks her 28th birthday on August 28

LeAnn Rimes: The country singer and actress marks her 28th birthday on August 28

LeAnn Rimes: The country singer and actress marks her 28th birthday on August 28

LeAnn Rimes: The country singer and actress marks her 28th birthday on August 28

LeAnn Rimes: The country singer and actress marks her 28th birthday on August 28

Heidi Klum: The model and mom turned 37 on June 1 and accidentally found her present from Seal hidden in his closet

Heidi Klum: The model and mom turned 37 on June 1 and accidentally found her present from Seal hidden in his closet

Heidi Klum: The model and mom turned 37 on June 1 and accidentally found her present from Seal hidden in his closet

Heidi Klum: The model and mom turned 37 on June 1 and accidentally found her present from Seal hidden in his closet

Heidi Klum: The model and mom turned 37 on June 1 and accidentally found her present from Seal hidden in his closet

Jessica Lopez: The multi-talented superstar turns 41 on July 24

Jessica Lopez: The multi-talented superstar turns 41 on July 24

Jessica Lopez: The multi-talented superstar turns 41 on July 24

Jessica Lopez: The multi-talented superstar turns 41 on July 24

Jessica Lopez: The multi-talented superstar turns 41 on July 24