Pop Bytes: Beyonce Asks Luke James to Join Her Mrs. Carter World Tour + More

Beyonce nabs R&B crooner Luke James for the European leg of her tour. [TheDrop.fm]

Speaking of Beyonce, she thinks Blue Ivy could be president… one day. [Evil Beet Gossip]

RaeLynn from Season 2 of 'The Voice' signs with Dr. Luke. [Rickey]

Nick Lachey has not-so-nice-words for Kim Kardashian. [Hollywire]

Pretty cool. Twitter launches a new music app. [Contact Music]

Darren Criss plans on announcing details of a debut album a tour… very soon. [Hypable]

Miranda Lambert reveals "the secret" to her marriage working with hubby and 'The Voice' judge Blake Shelton. [StarCrush]