Particularly those who've bounced back ridiculously fast from their baby-bumping days.
Today's case in point? Jessica Simpson, who took time out this week to share how impressed she is with the toned bod (recently put on display) of pal Jessica Alba.
"New goal: look like @jessicaalba after baby. Job well done lady!" she tweeted Tuesday, the same day, not so coindentally, some fab bikini shots of Alba—just four months out from the birth of daughter Haven—emerged.
And the 31-year-old expectant mother's admiration didn't go unheeded.
"OMG! Ur so sweet! Thx hon!" Alba replied.
In any case, the longtime and slightly surprising pals—the duo both attended the 10-year reunion of their Yale grad partners together this summer—have plenty of time to swap tips. Simpson hasn't yet confirmed when she's due, though she only announced her pregnancy in October.
Tags: Albas, Bikini, Jessica, Secrets, Simpson, Wants