
Not surprising, when you consider that Ms. Alba is an outspoken advocate for eating healthy and staying in good psychical shape. As for Jessica Alba's weight, I would guesstimate that she weighs approximately 115 lbs.
Now that may sound a little low for the average bear, but you must consider that Jessica Alba has a lean body mass due to her dedicated exercise routine.
Even while pregnant she didn't let her 'go', instead she nurtured herself and her unborn baby with a balanced diet. Hence why she was able to shed her minimal baby-weight after giving birth.