Jessica Simpson and Eric Johnson step out separately in California on July 30 after welcoming baby Ace last month. Credit:

Busy parents of two! After welcoming their second child -- son Ace Knute -- one month ago, Jessica Simpson and fiance Eric Johnson divided and conquered to run errands around California on Tuesday, July 30.

Johnson gave mom Simpson a break by taking daughter Maxwell, 14 months, and baby Ace, 1 month, to a doctor's office in Beverly Hills. The former NFL player, 33, carried adorable Maxwell in one arm while holding a bottle in the other. His son, Ace, followed behind in a baby carrier, which was held by a nanny and covered with a blanket.

Simpson, meanwhile, was spotted heading into a laser treatment center with a friend in L.A. The fashionista, 33, kept her post-baby body mostly covered up under a baggy animal-print top and hid behind a large orange purse.

As Us Weekly exclusively reported, Simpson delivered her little boy via C-section on June 30. "The baby is beautiful. He has Eric's little chin dimple!" a source told Us shortly after the birth. "Maxwell is excited. She doesn't totally get it and understand, but she is very excited to have a brother."

While Simpson focuses on her family's latest addition, she's also saying goodbye to her TV family. NBC confirmed during the summer TCA press tour on July 27 that Fashion Star has been canceled after two season. Simpson was featured as a mentor on the reality series along with Nicole Richie and John Varvatos. But Simpson has other projects in the works, including the launch of her Fall 2013 fashion campaign.