Madonna won’t have much time to fret about turning 50.

While many people passing the milestone may prefer to pause and reflect, the “queen of pop” is in the midst of final preparations for her world tour which kicks off in Cardiff, Wales, on August 23, a week after her birthday.

If previous shows are anything to go by, the 40-plus “Sticky & Sweet” dates around the globe will put Madonna under the kind of physical and mental strain that would test a woman half her age.

But the world’s most successful female recording artist has never let age, sex or background get in her way, and has remained in the ascendancy with an uncanny ability to reinvent herself just when the old Madonna was nearing her sell-by date.

Her latest reincarnation is a shrewd businesswoman, after she severed ties with long-term record label Warner Brothers to sign up with Live Nation, a company that until recently specialized in music tours.

As well as earning a reported $120 million over the life of the agreement, Madonna appeared to be among the first to recognize which way the music industry was heading.

Recorded music, many artists now believe, is making them less money than live performing, meaning they are looking to spend less time in the recording studio and more on the stage.

Lindsay Lohan and Jessica Simpson have been recreated as blow-up sex dolls.

The Herbie: Fully Loaded actress and The Dukes of Hazzard star Jessica have been added to Pipedream Products line of the inflatable toys.

The Lindsay Fully Loaded Love Doll’bears the slogan: “She’s no love bug, she’s a fiery red … who never says no and is always up for a good time.”

While Jessica’s ‘Love Doll’, which comes with “three thrilling holes” reads: “She’s sexy, newly single, and ready for you! This hot blonde bombshell has three thrilling holes to satisfy your every desire, and since she’s dumb as an ox, she never says no!”

Other new additions to the $19.95 collection include Sarah Jessica Parker, Sin City star Jessica Alba and Eva Longoria. Pamela Anderson, Christina Aguilera, Jennifer Lopez and Paris Hilton dolls also appear in the range.

Pipedream Products are reportedly planning to add a Britney Spears toy to their collection in the near future.

Dilemma: Paris Hilton is developing a new reality show in which she looks for a new best friend, and she’s also stepping out with her new boyfriend, Good Charlotte rocker Benji Madden, who just split from his fiancee less than two weeks ago. Which item do we lead with? They just don’t teach you this in journalism school.

We’ll go with the one that lends itself better to cheap jokes. A source tells Us Weekly that the reality show will reveal a new side of “The Simple Life” star. Like the back of her left earlobe? Because we think we’ve seen Hilton from just about every other angle.

“Paris is tired of the haters, and she’s looking for someone new,” the source says. “She’s looking for someone new and cool who she can trust.” Yes, because reliability, stability and loyalty are hallmarks of reality show contestants. Us reports that the show, still untitled, is probably going to air on MTV or VH1.

Meanwhile, Hilton has been out and about with Madden, who is the twin of Good Charlotte singer Joel Madden, who also happens to be the baby daddy of Hilton’s onetime BFF and “Simple Life” co-star, Nicole Richie.