Justin Bieber cancels Portugal show; Rihanna cancels Boston

Canadian teen heartthrob Justin Bieber has cancelled one of two scheduled concerts in Portugal next week, just after completing what he admitted had been a rough week in London, promoters said Saturday.

The 19-year-old was scheduled to perform at the Pavilhao Atlantico in Lisbon on March 11 and March 12 but the second appearance was cancelled.

Within a few days, the 19-year-old pop sensation angered some of his fans for being late on stage, then suffered a health scare and was involved in a foul-mouthed confrontation with a photographer.

Music promoters "Everything is new" said on their website that Bieber cancelled his Tuesday Lisbon concert "due to unforeseen circumstances", but insisted the teen idol was still keen to perform on Monday.

A Portuguese newspaper had said that, while the first date was sold out, ticket sales had been suspended for the second night due to insufficient demand.

But the site assured Bieber's dedicated following that the 'Canadian singer is eager to play for the Portuguese fans on March 11.'

Ticket holders for the cancelled date were directed to contact the original place of purchase for refunds.

While the Under the Mistletoe singer was hospitalized on Thursday it is unlikely that this is the reason for his absence, since it is the second show being cancelled on the agenda.

Rihanna cancels concert

Rihanna has been forced to cancel her concert in Boston after contracting laryngitis

The 'Stay' singer - who kicked off her new 'Diamond' world tour on Friday night (08.03.13) - has come down with a severe case of laryngitis but is hoping a two day break from performing will cure her in time for her next concert in Baltimore on Tuesday (12.03.13).

Live Nation shared the 25-year-old star's disappointment with gossip website TMZ.com earlier, saying: "Unfortunately, following her sold out concert on Friday, Rihanna has contracted laryngitis and per doctor's instruction is unable to perform this evening."

But they said she is still scheduled to play a show in Baltimore on Tuesday, and her Boston show will be rescheduled.

A source previously claimed that Rihanna couldn't wait to get out on tour and took it easy in rehearsals so she could save her energy for her fans.

The insider said: "She's good, excited to kick off this [tour] and do it big. She's already hyped up and doing some light rehearsals but other than that, she's taking it easy. Saving all the energy for the show."

The singer was also said to have prepared for her new world tour with the help of her mother and boyfriend Chris Brown.

Chris has been in constant contact with the 'We Found Love' singer while Rihanna also turned to her mother Monica as she prepared to hit the road.

A source said: "Chris wished her a good show a few nights ago.

"She been talking to her mom, you know, getting her head right."

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