One week after she welcomed baby girl Maxwell Drew, Jessica Simpson gave her five million-plus Twitter followers an update on her precious daughter.

"I am so in love with baby Maxwell," the singer wrote Tuesday, gushing over her first-born with Eric Johnson. "I want to cry every time I look at her."

"Motherhood is by far the best thing I've ever experienced."

"Little" Maxwell arrived at Cedars-Sinai Medical Center in Los Angeles the morning of Tuesday, May 1, and weighed in at a whopping 9 lbs., 13 oz.

Jess claims everything is swell now. OK! begs to differ.

Jessica Simpson and BabyJessica Simpson Baby Meltdown

The mogul, who heads a fashion empire that reportedly grosses $1 billion a year and stars on NBC's Fashion Star, is melting down ... the tabloid claims.

The 31-year-old may be cracking under the intense pressure to get back to work as quickly as possible, OK! claims, a situation that also upsets Eric.

He hoped that once their daughter was born, Jessica would take a break from her busy schedule. Whether that actually occurs remains to be seen.

"The sky's the limit," Jessica said in February. "Even with music and acting and being a mom and anything else that I want to do, I know that I can do it all."

"Life is definitely always about expanding. That's how we grow."

Easy to say at the time, but now that the reality of being a mom has set in, Jessica isn't so sure ... about that or marrying Eric, or losing 65 pounds. Gonna be rough.