BumpWatch: Kristin Richardson’s Backstreet Belly

04/22/2013 at 03:00 PM ET

Backstreet Boys Kevin Richardson
Jim Smeal/BEImages

The Backstreet brood continues to expand!

After celebrating their 20th anniversary over the weekend, the boys — A.J. McLean, Brian Littrell, Howie Dorough, Kevin Richardson and Nick Carter — gathered to unveil their star on the Hollywood Walk of Fame on Monday in Los Angeles.

Joining Richardson, 41, at the ceremony was wife Kristin — whose pregnancy was announced last week — and their son Mason, 5½.

This will be the third Backstreet baby in the past year — Dorough welcomed son Holden in February while McLean welcomed daughter Ava in November.

RELATED: Second Child on the Way for Kevin Richardson

Backstreet Boys Kevin Richardson

FILED UNDER: Kids , Maternity , News

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Popsicle on

She has such a beautiful smile

Corie on

She’s so pretty. And tastefully dressed, unlike celebs who want to show off baby bumps dressed like sluts. Kristin is dressed modestly. Kudos to her.

Sara on

Great-looking couple! Happy-looking mommy equals content, sweet-looking little boy.

Reesca on

She is gorgeous, congrats to them! It’s refreshing to see celebs having children more spaced apart (with the same partners). You don’t see many couples doing that these days. My daughters are 4.5 years apart and the age difference is wonderful!

Julianna on

Awwww so cute! And Mason is adorable!