Shakira has turned out to be a great coach on NBC's "The Voice," that gives the hopeful singers an outstanding mentor due to her experience in show business. The "Hips Don't Lie" singer has fit in well with Usher, Blake Shelton (who recorded a song with her on her latest album) and Adam Levine. It is this last coach that her boyfriend is having trouble with according to Star magazine. Gerard Piqué, is allegedly uneasy with the behavior and flirty exchanges between the Maroon 5 lead singer and the mother of his son Milan. "Adam is always touching Shakira," an insider told the gossip magazine. "Gerard is livid." The source also added that Piqué is "keeping a close eye" on Levine who announced in July last year his engagement to Victoria's Secret model Behati Prinsloo.

The truth is that Adam flirts with everyone, not just his fellow coach. Shakira has previously admitted that the Barcelona soccer star is very territorial over her. Remember that hot and racy video with Rihanna, "Can't Remember To Forget You?" The Colombian singer told Billboard magazine she had to ask her boyfriend for permission to shoot it. "He's very territorial, and since he no longer lets me do videos with men, well, I have to do them with women," she said. "It's more than implied in our relationship that I can't do videos like I used to. It's out of the question - which I like, by the way. I like that he protects his turf and he values me, in a way that the only person that he would ever let graze my thigh would be Rihanna." Could his jealousy and insecurities lead to an ultimate fallout between the hot couple?

Shakira has made a strong debut on the Billboard 200 debuting at the No. 2 position, just below Disney's Frozen who scored an eight week at the top of the chart with 161,000 copies sold. The 37-year-old Colombian's self-titled album is her highest-charting ever with 84,000 sold. It moved past her previous record at No. 3 with "Laundry Service" in 2001. However, her latest musical effort was not able to surpass 2009's "She Wolf" which launched at No. 15 with 89,000 during the Christmas shopping season. Shakira has become a household name thanks to her stint as a coach on "The Voice" that airs on NBC. The television network also booked the "Can't Remember To Forget You" singer on "The Tonight Show Starring Jimmy Fallon" and "Today" to raise awareness of her latest musical recording.