According to a report, The Bachelor 2013 hunk Sean Lowe has allowed "fame to go to his head" ever since he joined Dancing With The Stars season 16.

A source disclosed that Lowe and Giudice's relationship "has taken a back seat" thanks to his "huge ego"- the reality star has been displaying "diva antics."

'When he goes to the (Dancing with the Stars) after-parties, he's always an hour late and brings the biggest entourage with him- like eight people," the source told Life & Style. "No one else does that," the insider added.

His obsession with the Hollywood life has grown so weary on his fiancée, said the source, that she flew to San Francisco to spend time with her sister. During her trip, Giudice had "a crying meltdown about everything she's going through," the source slipped.

Lowe eventually joined her on her family trip, but had to return to Los Angeles for DWTS rehearsals. The 34-year-old has been putting his work before their relationship: "Sean's putting his work first now, which means his relationship has to take a backseat," a source said. "But no woman wants to come in a distant second in her fiancé's life. Unless Sean is willing to put out his ambition and lust for fame and fortune, he's going to lose his chance with Catherine."

Daily Mail published photos of Giudice with her sister Monica, a schoolteacher, that were taken last week. According to another source, Giudice went with her sister to a student class trip and had a good time but the following day appeared in "deep thought" without Lowe.

On Monday, Lowe performed a moving tribute on DTWS to Giudice during week 4. He said the most memorable year of his life was 2012 because that is the year he "found" Giudice, he told DWTS cameras. 

Watch Lowe's dance tribute on DWTS here

Tags: Sean Lowe