A source told RadarOnline: ''Kourtney has already seen Kim have an over-the-top wedding with Kris Humphries and now she's watching her sister turn her Kanye West date into another big affair and she's getting mad that her own wedding is going to be overshadowed.
''She wants her wedding to be just as spectacular as Kim's.''
Kourtney and Scott - who have Mason, four, and one-year-old daughter Penelope together - are reportedly keen to wed in Mexico, while Kim, 33, and Kanye, 36, who have eight-month-old daughter North together, are getting hitched in Paris, France.
The source added: ''For a really long time Kourtney has felt like she is living in Kim's shadow but she doesn't want her wedding to be second to Kim's third trip down the aisle.
''Everyone knows that Kim is the most popular sister and Kourtney really wanted her wedding to be special, so she's not planning to let Kim steal her spotlight now.''
Meanwhile, the couple - who have been together for over seven years - are planning an intimate wedding and will splash out $100,000 on round trip private jet flights for their loved ones, as well as $30,000 a night on accommodation.
Jack Antonoff hears a ''female voice'' in his head when he writes music.
The show will be seen by everybody at the same time.
The Scottish comedian has been speaking about gaining a knighthood in the Queen's Birthday Honours List.
With Will Smith and Martin Lawrence fronting the franchise, 'Bad Boys' was a huge success for Sony Pictures upon its initial release in 1995.
The creator will be able to give her input during season 2 production.