Britney Spears long-term boyfriend has been searching for an engagement ring ready to propose to her later this year. Jason Trawick - who has been dating the pop star for around two years - has scoured several expensive celebrity jewellery shops looking for the perfect band for the 'Hold It Against Me hitmaker, and he is very close to making his final choice. An insider told website RadarOnline.com: He has been everywhere from Tiffany to Harry Winston looking for a ring and he is close to making his final decision. Dont expect anything too massive or obnoxious. This ring will be classy and under 4-carats. The 39-year-old agent is expected to pop the question by the end of the year when he whisks the 29-year-old blonde beauty away on holiday at the end of her 'Femme Fatale Tour, which concludes in Puerto Rico on December 10. A Spears family insider recently explained: Britney and Jason discuss marriage all the time. Britney is truly in love with Jason, and well, Jason has loved her for a very, very long time. Jason adores her two sons, Sean Preston and Jayden James. Jason is planning on taking Britney on a secluded getaway once the tour wraps, and its very likely he will pop the question at that time. If Britney ties the knot again it will be her third marriage after her wedding to childhood friend Jason Alexander in 2004, which lasted just 55 hours, and later that year she married dancer Kevin Federline, the father of her two boys, which lasted three years until their divorce in 2007. EPS