Justin Timberlake still mum on divorce rumors and marriage woes to Jessica Biel but continues to work hard as he will bring "Sexy Back" to Boston for his 20/20 Experience World Concert Tour.

Both the "Cry Me a River" singer Justin Timberlake and "Total Recall" actress Jessica Biel were the subject of several divorce rumors after they were not photographed together for a long time. Justin Timberlake even spent Valentine's Day alone as his 20/20 Experience World Concert Tour made a pit stop at the Air Canada Centre in Toronto.

Justin Timberlake's granny, Sadie Bomar, also said in an interview with the Sun that the couple have become too busy with their respective lives that they are having difficulting growing their family.

"I think Jessica finds that really tough. She's on her own a good deal," she said. "If he's not coming back at night that puts a strain on things, of course it does. It's hard to keep it all going but you have to have faith to keep it all going."

"They are married but they are so busy, both of them, it's hard going. I'm sure when it's right to have children they will, but not now," she added.

About a week ago, however, Jessica Biel disproved divorce rumors and wedding woes after she displayed her wedding ring on Instagram when she showed off her new set of nails by Deborah Lippman.

The divorce rumors started when Jessica Biel did not accompany Justin Timberlake to personally show her support as he hosted the Saturday Night Live last year. Jessica Biel was also a no-show in the American Music Awards in November when Justin Timberlake performed.

Meanwhile, Boston.com reported that Justin Timberlake will have a 29-song set for his "20/20 Experience World" concert at the TD Garden in Boston. Among the hit singles he will perform include "Rock Your Body," "Strawberry Bubblegum," "Suit & Tie," "Mirrors," "Like I Love You," and "Cry Me a River."