7 Months Ago, MTV.com says (in 50 Cent/ Fall Out Boy Tour Is Off To An Uneven Start) So we reached out to Fall Out Boy's and 50 Cent's camps to find out what's up. "He played the first date [April 17 in Dallas] ... then we had to cancel the whole show in Houston, but I saw him there too," FOB's Pete Wentz told MTV News in an e-mail. ...
Pete Wentz, Fall Out Boy rock UCF Arena Orlando Sentinel

And RapBasement.com says (in 50 Cent Cancels Show With Fall Out Boy)  TX
This isn't the first time that Fall Out Boy and 50 Cent had to cancel a concert together. Last week a show with the two hit makers at the Showgrounds in Texas was postponed due to severe weather conditions. Patrick Stump, the frontman of Fall Out Boy, ...

9 Months Ago, PerezHilton.com says (in 50 Cent Is Really Desperate, Goes On Tour With… Fall Out Boy!)  CA
50 Cent is due to join Fall Out Boy on their Believers Never Die Part Deux tour!!! Since when are 50 and Pete Wentz best buds??? Regardless, the rapper has been announced as performing at the April 14th date of FOB's Believers tour in Dallas, TX. ...